COVID-19 variants are the products of the evolution of the SARS-CoV-2 virus. They arise via mutations, but other forces also have roles to play in the generation and transmission of variants.
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Articles on SARS-CoV-2
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COVID-19 has taken away so much. An immunology researcher describes the good it may leave behind.
South Africa is still likely to experience periods of increased cases, smaller-scale outbreaks and even the development of new variants.
It’s easy to avoid common pitfalls when taking rapid antigen tests. Here are a few to watch out for.
A growing body of research shows that COVID-19 protocols should be extended to areas in which there is a human-animal interface such as zoos, wildlife sanctuaries and game farms.
Life-saving blood is needed for everything from treating cancers and chronic conditions to helping trauma victims. But blood donations have dropped to crisis levels during the pandemic.
Cases of the Omicron sub-variant BA.2 are now in Australia. While there’s no evidence it causes more severe disease than the original Omicron, early research suggests it’s more transmissible.
Endemic doesn’t mean we drop our guard, surrender to the virus or downgrade the threat the virus poses to individuals and the community.
Some of the omicron variant’s unique properties – such as its ability to spread rapidly while causing milder COVID-19 infections – could usher in a new phase of the pandemic.
None of our authors can see the future, but many do have expertise that offers insights about what’s reasonable to expect.
People are buzzing with questions about the omicron variant and whether it could help usher in herd immunity. A team of virologists deciphers the latest findings.
The health care system is hemorrhaging medical lab workers, in part because of COVID-19 infections and also because of burnout, low wages and better opportunities elsewhere.
Are economic drivers the reason for the reduced isolation period in the UK?
To discover your risk of catching coronavirus for any given situation, try our COVID-19 Aerosol Transmission Estimator.
Even with a variant like Omicron that may be more transmissible than earlier variants, vaccines remain the most effective tool for protection against COVID-19 and for ending the pandemic.
A nationwide genomic surveillance system analyzes positive COVID-19 tests to build a picture of which variants are spreading in the population.
Free rapid antigen tests makes public health sense and economic sense.
SARS-CoV-2 cannot improve indefinitely.
DNA sequencing has allowed researchers to catch new COVID-19 variants hours after receiving the first positive test sample.
Nearly all suicide-loss survivors experience guilt, wondering what they could have done to prevent it. But despite decades of research, experts struggle to identify risk factors and predict suicide.
Top contributors
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Professor of Medicine, University of Virginia
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Associate Professor, Epidemiology, Deakin University
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Research associate, Warren Alpert Medical School, Brown University, Brown University
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Professor of Global Biosecurity, NHMRC Principal Research Fellow, Head, Biosecurity Program, Kirby Institute, UNSW Sydney
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Dean Faculty of Health Sciences and Professor of Vaccinology at University of the Witwatersrand; and Director of the SAMRC Vaccines and Infectious Diseases Analytics Research Unit, University of the Witwatersrand
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Vice-Chancellor's Research Fellow, School of Health and Biomedical Sciences, RMIT University
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Instructor of Human Immunology, Emory University
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Virologist, Queen's University Belfast
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Research Fellow in Virology, University of Leeds
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Research Leader in Virology and Infectious Disease, Griffith University
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Professor of Molecular, Cellular and Developmental Biology, University of Colorado Boulder
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Postdoctoral Fellow in Virology and Immunology, University of Colorado Boulder
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Postdoctoral Fellow in Virology, University of Colorado Boulder
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Professor of Epidemiology Healthcare Infection and Infectious Diseases Control, UNSW Sydney
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Dean Faculty of Natural Sciences and Professor, University of the Western Cape
