Menu Close

Articles on COVID-19 vaccines and variants

Displaying 21 - 40 of 44 articles

Colorized scanning electron micrograph of a cell (orange) infected with UK B.1.1.7 variant SARS-CoV-2 virus particles (green), isolated from a patient sample. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland. (NIAID)

COVID-19 variants FAQ: How did the U.K., South Africa and Brazil variants emerge? Are they more contagious? How does a virus mutate? Could there be a super-variant that evades vaccines?

Variants of the original SARS-CoV-2 are now in wide circulation. That means the third wave of COVID-19 has come with new questions about the variants, their effects and what might come next.
The AstraZeneca vaccine was 70 per cent effective against symptomatic COVID-19 infection in a large multinational study, and recently reported 76 per cent overall efficacy against symptomatic COVID-19 in another large study done primarily in the United States. THE CANADIAN PRESS/John Woods

AstraZeneca COVID-19 vaccine FAQ: Why do the age recommendations keep changing? Does it cause VIPIT blood clots? Is it effective against variants?

With changing recommendations about AstraZeneca’s COVID-19 vaccine making headlines, many people have questions about its use.
A COVID-19 patient in an ICU unit in a hospital in Capetown, South Africa, in December 2020. A variant emerged in South Africa that has since spread to other parts of the world. Other new variants could emerge elsewhere. Rodger Bosch/AFP via Getty Images

How worried should you be about coronavirus variants? A virologist explains his concerns

As the US vaccinates millions more people each day, the novel coronavirus works to survive. It does this by mutating. So far, several variants are worrisome. A virologist explains what they are.
Daniel Cole/AP

New COVID variants have changed the game, and vaccines will not be enough. We need global ‘maximum suppression’

COVID-19 variants of concern have changed the game. We need to recognise and act on this to avoid future waves of infections, yet more lockdowns and restrictions, and avoidable illness and death.
Sequencing the genetic code of virus samples taken from COVID-19 patients reveals how SARS-CoV-2 is spreading and changing. Nate Langer/UPMC

Genomic surveillance: What it is and why we need more of it to track coronavirus variants and help end the COVID-19 pandemic

The US lags in testing coronavirus samples from COVID-19 patients, which can help track the spread of the virus and the emergence of new variants. But labs are ramping up this crucial surveillance.
A COVID-19 vaccine is administered at a clinic at Olympic Stadium in Montréal on March 1, 2021, marking the beginning of mass vaccination in the Province of Québec based on age. THE CANADIAN PRESS/Paul Chiasson

COVID-19 vaccine FAQs: Efficacy, immunity to illness vs. infection (yes, they’re different), new variants and the likelihood of eradication

With four COVID-19 vaccines approved for use in Canada, it’s time to answer FAQs about efficacy, immunity, eradication and variants.

Top contributors

More