Omicron subvariant expected to become dominant strain in Ontario: science table head – CBC

Immunity from vaccine, prior infection ‘much weaker’ against BA.5, expert says

Jun 28, 2022

The head of Ontario’s COVID-19 science table says a subvariant of Omicron is soon expected to become the dominant strain in the province.

The growth rate of the BA.5 subvariant has outpaced all previous lineages of the virus, according to a recent report from Public Health Ontario (PHO).

Dr. Fahad Razak, scientific director of the province’s COVID- 19 advisory table, said there is some cause for concern as BA.5 becomes the dominant strain.

Razak, an internist at Unity Health Toronto, said the variant is much better at getting around immunity, whether that immunity is from a vaccine, previous infection or both. He said immunity against the latest variant is “much weaker” when compared to previous Omicron subvariants like BA.1 and BA.2.

“It’s not giving you a lot of protection against BA.5,” Razak told CBC Radio’s Metro Morning on Tuesday.

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