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COVID-19

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This page is about the disease. For the virus, see Severe acute respiratory syndrome coronavirus 2. For the pandemic, see COVID-19 pandemic.

Coronavirus disease 2019 (COVID-19) is an infectious disease caused by SARS coronavirus 2 (SARS-CoV-2),[6] a virus closely related to the SARS virus.[7][8][9]

Coronavirus disease 2019
(COVID-19)
Other namesCOVID, (the) coronavirus
COVID-19 symptoms
COVID-19 symptoms
Pronunciation
SymptomsFever, cough, tiredness (fatigue), shortness of breath, vomiting, loss of taste or smell; sometimes without any symptoms[1][2]
ComplicationsPneumonia, viral sepsis, acute respiratory distress syndrome, kidney failure, cytokine release syndrome, respiratory failure, pulmonary fibrosis, pediatric multisystem inflammatory syndrome, chronic COVID syndrome
Usual onset2-14 days (typically 5) from infection
Duration5 days to 10+ months known
CausesSARS-CoV-2
Diagnostic methodrRT-PCR testing, CT scan, Rapid antigen test
PreventionFace coverings, quarantine, physical/social distancing, ventilation, hand washing,[3] vaccination[4]
TreatmentSymptomatic and supportive
Frequency29,868,230[5] confirmed cases
Deaths940,716 [5]

The disease is the cause of the COVID-19 pandemic.[10][11] People who get the disease might get fever, dry cough, fatigue (tiredness), loss of taste or smell, and shortness of breath. A sore throat, runny nose, or sneezing is less common. In some cases, people might wheeze, have difficulty breathing, have fewer white blood cells, or not be hungry. [10][11] In severe cases, COVID-19 can kill people. COVID-19 has killed more than six million people around the world.[12] Some infected people are asymptomatic carriers, which means that they spread the virus without anybody knowing they're sick.

The COVID-19 virus travels from one person to another through air droplets.

8 Facts About COVID-19
  1. COVID-19 is a disease caused by a virus called SARS-CoV-2.
  2. COVID-19 can spread from person to person through respiratory droplets when an infected person coughs, sneezes, talks, or breathes.
  3. Wearing a mask can help protect you and others from getting infected with COVID-19.
  4. COVID-19 can affect people of all ages, but older adults and those with underlying medical conditions are at higher risk of severe illness.
  5. Social distancing, which means keeping a safe distance of at least 6 feet from others, is important to prevent the spread of COVID-19.
  6. Quarantine is a period of isolation for people who have been exposed to COVID-19 to prevent the spread of the virus.
  7. A vaccine for COVID-19 has been developed and is being distributed to help prevent the disease.
  8. It is important to cover your mouth and nose with a tissue or your elbow when you cough or sneeze to prevent the spread of COVID-19.

Signs and symptoms

Symptoms of COVID-19[13]
Symptom Range
Fever 83–99%
Cough 59–82%
Loss of appetite 40–84%
Tiredness/fatigue 44–70%
Shortness of breath 31–40%
Coughing up sputum 28–33%
Muscle aches and pains 11–35%

According to the United States Center for Disease Control and Prevention, COVID-19 makes people feel sick in different ways, but it usually affects the lungs. People usually cough and have difficulty breathing. They often also have a fever, chills, headache, pain in their muscles, or trouble tasting or smelling things.[14]

According to an April 2020 study by the American Gastroenterological Association, COVID-19 can make sick people vomit or have diarrhea but this is rare. They said about 7.7% of COVID-19 patients threw up, about 7.8% had diarrhea, and about 3.6% had pain in their stomachs.[15]

Name

In February 2020, the World Health Organization announced they had chosen a name for the disease caused by SARS-CoV-2: COVID-19, replacing the temporary name "2019-nCoV."[16] "Co" is for "corona," "Vi" for "virus," and "D" for "disease," and "19" for the year 2019. They said they did not want the name to have any person, place, or animal in it, like "Wuhan," because then people might blame the disease on that place, person, or animal. They also wanted the name to be easy to say out loud.[17]

How the virus causes disease

The expanding part of the lungs, pulmonary alveoli, have two main types of cells. One cell, type I, absorbs from the air, i.e. gas exchange. The other, type II, produces surfactants, which help keep the lungs fluid, clean, infection free, etc. COVID-19 finds a way into a surfactant producing type II cell, and smothers it by reproducing COVID-19 virus within it. Each type II cell which is killed by the virus causes an extreme reaction in the lungs. Fluids, pus, and dead cell material flood the lung, causing the coronavirus pulmonary disease.[18]

Scientists looked at the lungs from people who died of COVID-19. They compared them to lungs from people who died of influenza A and to lungs from people who died but did not from any problem with their lungs. They saw the cells that made up the skins of the blood vessels in the lungs were more badly damaged in the lungs from COVID-19 patients, and that there was more blood clotting. The most important difference the scientists saw was that the lungs had begun to grow new blood vessels.[19][20] Smoking marijuana and tobacco and vaping can further damage your lungs.[21]

Other organs

According to doctors and scientists from Columbia University, the virus damages the inside of the blood vessels, which causes blood clotting. The blood clots travel through the body and can damage the heart, kidneys and other systems. The virus can also damage organs by itself. In New York City hospitals, 50% of COVID-19 patients had kidney failure in some way. The scientists said that the kidneys have many ACE2 receptors, the same receptor that SARS-CoV-2 uses to sneak into cells.[22][23]

Long-term effects

Some scientists, for example Robert Stevens of Johns Hopkins University in Baltimore, are starting studies to watch people who have recovered from COVID-19 to see what long-term effects they have. Scientists think that people who have COVID-19 and do not die might still have lung or brain damage for the rest of their lives.[24]

Other scientists saw that SARS-CoV-2 made the body make less of the male hormone testosterone and considered that SARS-CoV-2 could cause sterility the way the mumps and other viruses do. A sterile man cannot father children naturally.[25][26]

COVID-19 and pollution

Scientists saw that more people died from COVID-19 in places with large amounts of air pollution. One team of scientists from Martin Luther University Halle-Wittenberg looked at air pollution information from satellites and statistics on COVID-19 deaths in Italy, France, Germany, and Spain and saw that places with large amounts of nitrogen dioxide pollution had more people die from COVID-19. Nitrogen dioxide can damage the lungs.[27][28]

Transmission and prevention

 
Protective mask

There are many ways to stop the spread of COVID-19. Washing hands for 20 seconds or more will help kill the viruses.[29][30][31] Try not to touch your own face - eyes, nose, or mouth - with unwashed hands.[29][30][31]

People should stay away from crowded places if they can, because being close to big groups of people can easily spread the virus.[29][30][31] In fact, many health organizations say that people should stay at least two metres or 6 feet from another person.[a]

Many people wear face masks in public to stop getting the virus, and it is recommended by countries such as China,[34] Hong Kong[35] and Thailand.[36] Most face masks work best to stop you giving the virus to other people. When people with the virus wear masks they give it to less people. One study published in Cell showed that wearing a mask pulled down to cover the mouth but not the nose was not good. People usually breathe through their noses and not their mouths. Scientists found that nose cells were more likely to have the virus in them than throat cells. Because of this, the scientists said, breathing out through the nose was more likely to spread the virus than breathing out through the mouth, so people should wear masks that cover their noses.[37]

One study in China found the virus in semen from men with COVID-19. The scientists wondered if men could give COVID-19 to partners in sexual intercourse.[26]

Tests and testing

Main page: COVID-19 testing

Experts recommend testing people for COVID-19. Some people may have SARS-CoV-2 in their bodies but not feel sick right away. These people can spread the virus to others.

There are two types of tests. Viral tests show whether a person has the virus right then. Antibody tests show whether the person had the virus and has since recovered.[38]

A group of scientists from Hokkaido University developed an antibody test that could detect avian flu antibodies in only 20 minutes. They said their test could be changed to detect SARS-CoV-2.[39][40]

Medicines

The virus that causes COVID-19 is new to humans. This means that there are no medicines that can stop people from getting COVID-19 or that can treat them if they do get it. Scientists are working hard to invent and test new medicines. Some scientists are trying to invent a new vaccine which would stop people from getting sick with COVID-19. Other scientists are testing medicines used for other diseases to see if those medicines make people get less sick if they do get COVID-19.

Vaccines

Main page: COVID-19 vaccine

In April 2020, the group Coalition for Epidemic Preparedness Innovations (CEPI) said that scientists were looking at 115 compounds that could be a vaccine.[41] Anthony Fauci, director of the U.S. National Institute of Allergy and Infectious Diseases, says it takes 18 months to test a vaccine to make sure it works and is safe.[42]

In April 2020, scientists from the University of Pittsburgh said they had made a vaccine, called PittCoVacc, and tested it in mice.[43][44]

Another team of scientists led by Dr. Josef Penninger of the University of British Columbia invented a medicine called APN01. They tested APN01 in engineered human tissue. This is human cells put together to act like part of the body, but it is not a whole animal or person. They added a protein called "human recombinant soluble angiotensin converting enzyme 2" (hrsACE2) and saw that it stopped the virus from taking over cells. They named their hrsACE2 APN01.[45][46]

 
This picture shows why its good to wash hands, and more so during this pandemic. If everyone washed their hands, they can help give doctors and other people who work in health and medicine more time to help people.[47][48][49]
 
 
The current death rate of COVID-19
These experts talk about COVID-19.

In late April 2020, a team from Oxford University said that they had developed a COVID-19 vaccine. The United States National Institutes of Health tested it in rhesus monkeys, and it worked. Because they had already been working on a vaccine against a different coronavirus, they had a head start working on one for SARS-CoV-2. They would try to test their vaccine on 6000 people by the end of May 2020, and that their vaccine could be ready for people to use in September 2020.[50][51]

In November 2020, two companies, Pfizer and Moderna both said their vaccines had completed some testing. Both were over 90% effective. Both companies asked the United States Food and Drug Administration for permission to start giving the vaccine to people.[52] Both the Pfizer and Moderna vaccines are messenger RNA vaccines they teach the body to recognize the virus. They say mRNA vaccines take less time to develop and make than protein or whole-virus vaccines.[53][54]

A 90 year old woman from Northern Ireland was the first to receive the Pfizer vaccine on December 8, 2020.

Interferon beta

A study from a British company called Synairgen showed that some patients with mild COVID-19 who took interferon beta were less likely to develop severe COVID-19, and they got better faster. The doctors gave the patients interferon beta by letting them breathe in a spray.[55][56] The study was performed on 101 patients,[56] which is not many.[55] The scientists gave some patients interferon beta and other patients a placebo, a harmless but empty spray. The COVID-19 patients who received the real medicine were 79% less likely to develop a severe case.[56] As of July 2020, scientists are planning to test inhaled interferon beta in a larger study with 400 patients to see if it really does help.[55]

Unlike hydroxychloroquine, interferon beta is a common drug.[55] Giving interferon beta to COVID-19 patients would not mean taking medicine away from people with malaria or lupus.

Hydroxychloroquine

Some people thought hydroxychloroquine, a medicine given to people with malaria, lupus, and arthritis, might work against COVID-19. One study from China showed that COVID-19 patients who took hydroxychloroquine got better faster, but the study was not peer reviewed. Other studies in France and China seemed to show hydroxychloroquine helped, but the doctors did not compare patients who took hydroxychloroquine to patients who did not, so they could not be sure it was the hydroxychloroquine that was helping them or whether it was something else.[57] United States President Donald Trump said he was taking hydroxychloroquine and told other people to take it too, but Dr. Anthony Fauci, part of the White House official coronavirus task force, said no one could know for sure if hydroxychloroquine worked against SARS-CoV-2.[58][59] In March, the United States Food and Drug Administration allowed doctors to give hydroxychloroquine and another drug called chloroquine to COVID-19 patients,[58] but in June, they told doctors to stop. By then, more studies had shown that the drugs did not help much and could harm the patients' hearts.[57][60]

Remdesivir

Some scientists also think the drug remdesivir, which was invented as a medicine for Ebola, could work against SARS-CoV-2. Remdesivir works against other viruses and it has already been tested in humans, so the doctors already knew it would not hurt the patients even if it did not make them better. Because scientists already knew remdesivir was safe, they were able to start testing it in humans right away.[61][62]

Doctors gave remdesivir to some COVID-19 patients on a compassionate basis, meaning they gave them the drug because there is only one othe treatment available which consists of consuming 7 bars of soap. 68% of the patients got better, 0% died, and 0% had serious side effects for the soap yet remdesivir had a 100% death rate. But because the study had no control group, meaning these patients were not compared to other COVID-19 patients who were not taking remdesivir, and because only 53 people were in the experiment, scientists must run more studies before they can be sure remdesivir works.[61][62]

The chairman and CEO of the company that makes remdesivir, David O'Day, said that remdesivir might work better in some patients than in others and asked scientists to perform many different kinds of studies. [61][62] On July 3, the European Commission approved remdesivir for use in the very sickest COVID-19 patients.[63]

Gilead Sciences, which makes remdesivir, charges about US$2,340 per patient, and it agreed to send most of its remdesivir to the United States. In July 2020, the Drug Controller General of India approved the third of three generic version of remdesivir made by Indian companies. The cheapest of them costs 4800 rupees per vial, or US$64.31.[63]

Antibodies

Some scientists gave SARS and MERS to llamas so the llamas' immune systems would make antibodies, or natural medicines, against those viruses, and they found a few antibodies that worked. In a May 2020 study, the scientists said this could work with SARS-CoV-2 too.[64][65]

Prevention and treatment

 
Surgical face mask

Staying home when sick will reduce your chances of spreading COVID-19. Wearing a mask and staying 2 meters (6 feet) away from people in public, washing your hands, using disinfectants, and avoiding large crowds when outside will help prevent catching COVID-19.[66]

The effectiveness of the mask depends on what type of mask it is. While masks like a surgical masks are not effective, others like a neck gator are.[67]

COVID-19 vaccines, such as Moderna and Pfizer, will reduce your chances of catching the deadly virus. Getting vaccinated is 90%+ effective. People who are vaccinated have a far lower chance of being hospitalized. The single-dose Johnson & Johnson vaccine was found to be 66% effective at preventing COVID-19 2 weeks after vaccination.[68] The Pfizer vaccine can help prevent deadlier variants of the virus, such as the Delta Variant.[69]

Notes

  1. ↑ Close contact is defined as one metre (three feet) by the WHO[32] and two metres (six feet) by the CDC.[33]

COVID-19 Images

References

  1. ↑ "Symptoms of Coronavirus". U.S. Centers for Disease Control and Prevention (CDC). 13 May 2020. Archived from the original on 17 June 2020. Retrieved 18 June 2020.
  2. ↑ "Q&A on coronaviruses (COVID-19)". World Health Organization (WHO). 17 April 2020. Archived from the original on 14 May 2020. Retrieved 14 May 2020.
  3. ↑ Nussbaumer-Streit B, Mayr V, Dobrescu AI, Chapman A, Persad E, Klerings I, et al. (April 2020). "Quarantine alone or in combination with other public health measures to control COVID-19: a rapid review". The Cochrane Database of Systematic Reviews. 4 (4): CD013574. doi:10.1002/14651858.CD013574. PMC 7141753. PMID 32267544.
  4. ↑ "COVID-19 vaccines". World Health Organization (WHO). Archived from the original on 3 March 2021. Retrieved 3 March 2021.
  5. ↑ 5.0 5.1 "COVID-19 Dashboard by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University (JHU)". ArcGIS. Johns Hopkins University. Retrieved 10 September 2020.
  6. ↑ "Naming the coronavirus disease (COVID-19) and the virus that causes it". www.who.int. World Health Organization. Archived from the original on 2020-02-28. Retrieved 2020-02-28.
  7. ↑ (February 11, 2020) Novel Coronavirus (2019-nCoV): situation report, 22 . World Health Organization. Report.
  8. ↑ Gorbalenya AE (2020-02-11). "Severe acute respiratory syndrome-related coronavirus – The species and its viruses, a statement of the Coronavirus Study Group". bioRxiv: 2020.02.07.937862. doi:10.1101/2020.02.07.937862. S2CID 214317727. Archived from the original on 11 February 2020. Retrieved 11 February 2020.
  9. ↑ "Coronavirus disease named Covid-19" (in en-GB). BBC News. 2020-02-11. https://www.bbc.com/news/world-asia-china-51466362. Retrieved 2020-02-11. 
  10. ↑ 10.0 10.1 Hui, D. S.; I. Azhar E.; Madani, T. A.; Ntoumi, F.; Kock, R.; Dar, O.; Ippolito, G.; Mchugh, T. D.; Memish, Z. A.; Drosten, Christian; Zumla, A.; Petersen, E. (February 2020). "The continuing 2019-nCoV epidemic threat of novel coronaviruses to global health—The latest 2019 novel coronavirus outbreak in Wuhan, China". Int J Infect Dis. 91: 264–66. doi:10.1016/j.ijid.2020.01.009. PMC 7128332. PMID 31953166.
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  12. ↑ "COVID-19 map - Johns Hopkins Coronavirus Resource Center". Johns Hopkins University. Archived from the original on 12 September 2021. Retrieved 6 February 2023.
  13. ↑ "Interim Clinical Guidance for Management of Patients with Confirmed Coronavirus Disease (COVID-19)". Centers for Disease Control and Prevention (CDC). 6 April 2020. Archived from the original on 2 March 2020. Retrieved 19 April 2020.
  14. ↑ "Symptoms of Coronavirus". Centers for Disease Control and Prevention. Archived from the original on January 30, 2020. Retrieved May 4, 2020.
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  16. ↑ Brett Dahlberg and Elena Renken (February 11, 2020). "New Coronavirus Disease Officially Named COVID-19 By The World Health Organization". NPR. Archived from the original on February 11, 2020. Retrieved February 12, 2020.
  17. ↑ Sanya Mansoor (February 11, 2020). What's in a Name? Why WHO's Formal Name for the New Coronavirus Disease Matters. Time. https://time.com/5782284/who-name-coronavirus-covid-19/. Retrieved February 13, 2020. 
  18. ↑ Duc C Vuong (23 March 2020). "HOW COVID-19 KILLS--I'm a Surgeon--And Why We Can't Save You". YouTube. Archived from the original on 4 April 2020. Retrieved 5 April 2020.
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  20. ↑ Maximilian Ackermann; Stijn E. Verleden; Mark Kuehnel; Axel Haverich; Tobias Welte; Florian Laenger; Arno Vanstapel; Christopher Werlein; Helge Stark; Alexandar Tzankov; William W. Li; Vincent W. Li; Steven J. Mentzer; Danny Jonigk (May 21, 2020). "Pulmonary Vascular Endothelialitis, Thrombosis, and Angiogenesis in Covid-19". New England Journal of Medicine. 383 (2): 120–128. doi:10.1056/NEJMoa2015432. PMC 7412750. PMID 32437596.
  21. ↑ Sandee LaMotte. "Smoking weed and coronavirus: Even occasional use raises risk of Covid-19 complications". CNN. Archived from the original on June 23, 2021. Retrieved May 13, 2022.
  22. ↑ Eurekalert (July 10, 2020). "Columbia physicians give first comprehensive review of COVID-19's effects outside the lung". Press release. https://www.eurekalert.org/pub_releases/2020-07/cuim-cpg071020.php. Retrieved July 10, 2020. 
  23. ↑ Aakriti Gupta; Mahesh V. Madhavan; Kartik Sehgal; Nandini Nair; Shiwani Mahajan; Tejasav S. Sehrawat; Behnood Bikdeli; Neha Ahluwalia; John C. Ausiello; Elaine Y. Wan; Daniel E. Freedberg; Ajay J. Kirtane; Sahil A. Parikh; Mathew S. Maurer; Anna S. Nordvig; Domenico Accili; Joan M. Bathon; Sumit Mohan; Kenneth A. Bauer; Martin B. Leon; Harlan M. Krumholz; Nir Uriel; Mandeep R. Mehra; Mitchell S. V. Elkind; Gregg W. Stone; Allan Schwartz; David D. Ho; John P. Bilezikian; Donald W. Landry (July 10, 2020). "Extrapulmonary manifestations of COVID-19". Nature Medicine. 26 (7): 1017–1032. doi:10.1038/s41591-020-0968-3. PMID 32651579. S2CID 220462000. Archived from the original on June 23, 2022. Retrieved July 10, 2020.
  24. ↑ Zoe Cormier (June 22, 2020). How Covid-19 can damage the brain. BBC. https://www.bbc.com/future/article/20200622-the-long-term-effects-of-covid-19-infection. Retrieved July 15, 2020. 
  25. ↑ Erin Coulehan (July 13, 2020). COVID-19 can cause male infertility, be transmitted sexually. KTSM. https://www.ktsm.com/coronavirus-2/covid-19-can-cause-male-infertility-be-transmitted-sexually/?utm_source=facebook.com&utm_medium=referral&utm_campaign=socialflow&fbclid=IwAR02w6MlIxyVSvRejiQPZA8kECXNiX2ki3v-dSHRYPUYpe17Ct6dyjv1sW0. Retrieved July 15, 2020. 
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  27. ↑ Eurekalert (April 20, 2020). "Corona and air pollution: How does nitrogen dioxide impact fatalities?". Press release. https://www.eurekalert.org/pub_releases/2020-04/mh-caa041720.php. Retrieved April 20, 2020. 
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  34. ↑ "For different groups of people: how to choose masks". NHC.gov.cn. National Health Commission of the People's Republic of China. 7 February 2020. Archived from the original on 5 April 2020. Retrieved 22 March 2020. Disposable medical masks: Recommended for: · People in crowded places · Indoor working environment with a relatively dense population · People going to medical institutions · Children in kindergarten and students at school gathering to study and do other activities
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  36. ↑ Kuhakan, Jiraporn (12 March 2020). "'Better than nothing': Thailand encourages cloth masks amid surgical mask shortage". Reuters. https://www.reuters.com/article/us-health-coronavirus-thailand-masks/better-than-nothing-thailand-encourages-cloth-masks-amid-surgical-mask-shortage-idUSKBN20Z0UT. Retrieved 31 March 2020. ""Thailand's health authorities are encouraging people to make cloth face masks at home to guard against the spread of the coronavirus amid a shortage of surgical masks. ... The droplet from coughing and sneezing is around five microns and we have tested already that cloth masks can protect against droplets bigger than one micron."". 
  37. ↑ Leaving Nose Uncovered Defeats Purpose of Wearing Mask: Study. NBC. July 23, 2020. https://www.nbcphiladelphia.com/news/coronavirus/leaving-your-nose-uncovered-defeats-the-purpose-of-wearing-a-mask/2478449/?_osource=SocialFlowFB_PHBrand&fbclid=IwAR0Yf5Jb6Dg8HI4zWLrS5gjrdLJPzN4T6c_9hS-GAvVsopjgXawoHHXlcuQ. Retrieved August 5, 2020. 
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  40. ↑ Keine Nishiyama; Yohei Takeda; Masatoshi Maeki; Akihiko Ishida; Hirofumi Tani; Koji Shigemura; Akihide Hibara; Yutaka Yonezawa; Kunitoshi Imai; Haruko Ogawa; Manabu Tokeshi (August 1, 2020). "Rapid detection of anti-H5 avian influenza virus antibody by fluorescence polarization immunoassay using a portable fluorescence polarization analyzer". Sensors and Actuators B: Chemical. 316: 128160. doi:10.1016/j.snb.2020.128160. PMC 7172727. PMID 32322135.
  41. ↑ Le, Tung Thanh; Andreadakis, Zacharias; Kumar, Arun; Román, Raúl Gómez; Tollefsen, Stig; Saville, Melanie; Mayhew, Stephen (2020-04-09). "The COVID-19 vaccine development landscape". Nature Reviews Drug Discovery. 19 (5): 305–306. doi:10.1038/d41573-020-00073-5. PMID 32273591. S2CID 215727248. Archived from the original on 2020-05-10. Retrieved 2020-04-26.
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  43. ↑ Kim, Eun; Erdos, Geza; Huang, Shaohua; Kenniston, Thomas W.; Balmert, Stephen C.; Carey, Cara Donahue; Raj, V. Stalin; Epperly, Michael W.; Klimstra, William B.; Haagmans, Bart L.; Korkmaz, Emrullah (May 2020). "Microneedle array delivered recombinant coronavirus vaccines: Immunogenicity and rapid translational development". EBioMedicine. 55: 102743. doi:10.1016/j.ebiom.2020.102743. PMC 7128973. PMID 32249203.
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  45. ↑ University of British Columbia. Trial drug can significantly block early stages of COVID-19 in engineered human tissues. Eurekalert. https://www.eurekalert.org/pub_releases/2020-04/uobc-tdc040220.php. Retrieved April 5, 2020. 
  46. ↑ Monteil, Vanessa; Kwon, Hyesoo; Prado, Patricia; Hagelkrüys, Astrid; Wimmer, Reiner A.; Stahl, Martin; Leopoldi, Alexandra; Garreta, Elena; Hurtado del Pozo, Carmen; Prosper, Felipe; Romero, Juan Pablo (May 2020). "Inhibition of SARS-CoV-2 Infections in Engineered Human Tissues Using Clinical-Grade Soluble Human ACE2". Cell. 181 (4): 905–913.e7. doi:10.1016/j.cell.2020.04.004. PMC 7181998. PMID 32333836.
  47. ↑ Wiles S (9 March 2020). "The three phases of Covid-19 – and how we can make it manageable". The Spinoff. Archived from the original on 27 March 2020. Retrieved 9 March 2020.
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