It’s called infection-acquired seroprevalence, and it reflects the presence of COVID antibodies in people’s blood due to infection.
Before the Omicron wave began in late December 2021, infection-acquired seroprevalence was around six per cent of Canadians. By this past February, it had jumped to a stunning 77 per cent.
That means at least 27 million Canadians were infected between Dec. 1, 2021, and Jan. 31, 2023, according to the COVID-19 Immunity Task Force, a national group of experts formed to determine the extent of COVID infection in Canada.
“That’s what we call the Omicron tsunami,” says Dr. Tim Evans, executive director of the task force and a professor at McGill University. “It just gives you a sense of how transmissible the Omicron variant has been. It continues even today to be very widespread in Canada, and this is unlike any of the previous variants, which were much less transmissible.”link
This was predicted by Geert Vanden Bossche. People have antibodies for Omicron but they are vaccinal non-neutralizing antibodies, meaning they do not ‘kill’ the virus but assist it. With each reinfection people call up again more non-neutralizing antibodies. Vanden Bossche’s fear is that the virus will become more virulent but no less transmissible due to ongoing evolutionary conditions such as these. ABN