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Articles on Delta variant

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SARS-CoV-2, the virus that causes COVID-19, has evolved over time into multiple variants and sublineages. loops7 / E+ via Getty Images

Pivotal points in the COVID-19 pandemic – 5 essential reads

With the emergency phase of the COVID-19 pandemic in the rearview mirror, at least for now, we look back on a handful of stories that provided sharp insights at key moments in the pandemic.
B.C. Jobs Minister Ravi Kahlon has his COVID-19 vaccine QR code scanned in September, 2021. THE CANADIAN PRESS/Darryl Dyck

Pandemic vaccine passports in Canada: A brief history and potential future

Vaccine passports became one of the most divisive issues of the COVID-19 pandemic. These policies were affected not only by public opinion but by new variants and changing goals for herd immunity.
The CDC’s new recommendations have caused consternation among the public, the media and even among doctors. Justin Paget/DigitalVision via Getty Images

Clarifying the CDC’s COVID-19 quarantine and isolation guidelines – an infectious disease doc looks at the latest research

The CDC’s controversial recommendation changes are based on new studies showing that most omicron transmission takes place within five days of the onset of illness.
As the pandemic winds down, continual surveillance of wild animals is vital to ensure that it doesn’t switch to another sphere of life. Kamil Martinovsky/ shutterstock

COVID infection of three lions and a puma in private South African zoo points to need for wider surveillance

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.
Preliminary research suggests that the omicron variant may potentially induce a robust immune response. Olga Siletskaya/Moment via Getty Images

Is the omicron variant Mother Nature’s way of vaccinating the masses and curbing the pandemic?

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.
The list of SARS-CoV-2 variants – each with its own unique qualities that give it an edge – just keeps growing. Matt Anderson Photography/Moment via Getty Images

Alpha then delta and now omicron – 6 questions answered as COVID-19 cases once again surge across the globe

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.
South Africa is seeing a spike in COVID-19 cases. EMMANUEL CROSET/AFP via Getty Images

Omicron: evidence shows it evades immunity from earlier infection more than other variants

At this stage, we cannot say anything about the severity of cases with Omicron - either in primary or reinfections.

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