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Articles on Subvariants

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The FDA advisory committee discussed vaccine safety, effectiveness of the current shots, potential seasonality of COVID-19 and more. wildpixel/iStock via Getty Images Plus

FDA advisory committee votes unanimously in favor of a one-shot COVID-19 vaccine approach – 5 questions answered

Many questions remain about next steps for US vaccine policy. But the FDA advisory panel’s hearty endorsement of a single-composition COVID-19 vaccine represents a pivotal step.
XBB.1.5 is rapidly spreading across the globe and will likely become the next dominant COVID-19 subvariant. (Shutterstock)

FAQ on COVID-19 subvariant XBB.1.5: What is it? Where is it prevalent? How does it differ from Omicron? Does it cause serious illness? How can I protect myself? Why is it nicknamed ‘Kraken’?

The XBB.1.5 subvariant — nicknamed ‘Kraken’ — is arguably the most genetically rich and most transmissible SARS-CoV-2 Omicron subvariant yet.
Cathay Pacific crew members who worked on a flight from Hong Kong arrive at Vancouver International Airport. Canada now requires air travellers from China, Hong Kong and Macau to have a recent negative COVID-19 test result. THE CANADIAN PRESS/Darryl Dyck

Canada’s new COVID test rules: Targeting travellers from China will not stop globally circulating Omicron subvariant

Canada’s new COVID-19 testing requirement for travellers arriving from China is unlikely to prevent the spread of new subvariants.

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