As fall COVID-19 surge looms, is it worth waiting for an Omicron-tailored vaccine? - Terrace Standard

, which leaves some Canadians debating whether to wait for the revamped shots or go for a booster now.

Here’s a look at what we know about the bivalent vaccines, and how they could factor into a fall wave.Health Canada received Moderna’s bivalent vaccine application on June 30, while its British counterpart got the paperwork to start its review earlier that month, spokesman Mark Johnson said in an email. Pfizer filed a submission for its updated shot on July 25.

Infectious disease specialist Dr. Zain Chagla said he expects to see more countries authorize bivalent vaccines in the coming weeks and months, which should give Canada time to integrate the updated shots into its fall immunization campaign.Currently available COVID-19 vaccines are monovalent – tailored solely to the original novel coronavirus.

As the BA.4 and BA.5 Omicron subvariants gain steam in much of the country, the BA.1-tailored bivalent vaccines might not be that much better than a first-generation booster when it comes to deterring COVID-19 infection, Chagla said. But as a greater share of the population has gained hybrid immunity, it wouldn’t be unreasonable for low-risk people to wait for the latest version of the vaccine, Chagla said.

“By the time the wave occurs — two to three months — that’s barely enough to scratch the surface of getting a new vaccine,” he said. “There is this catch-up game that’s occurring all the time.”

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