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According to experts, the presence of BA.2.20 in Ontario does not guarantee serious concern.




Canadian press

Published Friday, May 20, 2022 at 16:12 EDT



Last updated Friday, May 20, 2022 16:13 EDT

Approximately 1,000 confirmed cases of a new sublineage of the Omicron variant have been found in Ontario so far, and new data from the Ontario Department of Public Health show that experts say it. States that does not justify serious concerns.

In a recent overview, the Ontario Public Health Service stated that BA.2.20, an evolution of the Omicron BA.2 subvariant, is growing primarily in Ontario.

According to the report, the sample collection date for the first case of BA.2.20 was February 14, with 996 confirmed cases in the state.

Over the past four weeks, the proportion of BA.2.20 cases has been stable at around 5.5%, but the Ontario Public Health Service has now limited test eligibility to high-risk populations, all of which. Said that it is not representative of BA. 2 cases in the state.

Dr. Zain Chagla, an associate professor of infectious diseases at McMaster University in Hamilton, said “no need for panic” because BA.2.20 did not cause a “leap” in COVID-19 cases overnight.

“This is probably buried in our BA.2 wave … (that is) what happened in our so-called sixth wave in the last few months is also related to this. It’s possible, “he said in a telephone interview on Friday.

“But the vaccine still seems to be very effective, the levels are declining … and recognizing that wastewater data is decreasing, hospitalizations are decreasing, and ICU stays are decreasing, It will not bring about any epidemiological changes in terms of the increase in infections, which really suggests that this (sub-strain) community transmission does not necessarily completely change the game. “

According to the Public Health Ontario, BA.2.20 has two more distinct mutations from the parent BA.2 strain, but the mutations affect infection, risk of serious illness, reinfection, and breakthrough infections. The impact is unknown.

Dr. Gerard Evans, a professor of infectious diseases at Queen’s University and medical director of infection prevention and management at the Kingston Health Science Center, said BA.2.20 has been in Ontario for about three months and has been “actually” so far. Has not expanded to. ” “”

“BA.2 was so different from BA.1 that I moved BA.1 when it came in, but BA.2.20 doesn’t do the same for BA.2,” Evans said. Mr. said.

“Therefore, I think this is a phenomenon we are monitoring and is not rarely seen all over the world. Usually, when (these sublineages) occur, there are some cases. In the end, it either disappears or penetrates with the original variant. “

According to an overview from the Ontario Public Health Service, the highest proportion of cases with BA.2.20 was in the 20-39 year old group, accounting for 38.9% of cases, followed by 40-59 year olds with 30.9%. rice field.

The public health unit with the highest proportion of BA.2.20 cases is Toronto Public Health, with 18.8% of cases, followed by the Middlesex-London Health Unit with 12.7%.

On Friday, Canada’s Supreme Public Health Officer, Dr. Teresa Tam, said public health officials were tracking various COVID-19 variants, but focused on new variants that could cause a significant increase in infection. Said that.

“Of course, what I’m really looking for is some substantive changes that there are entirely new variants of concern that aren’t Omicron variants, but I’ll track these … something happens. There is a possibility and we will continue to be vigilant, “she said.

Ontario reported 1,412 new COVID-19 infections on Friday, but PCR testing is limited to specific groups. Multiplying the number of cases per day by 10 gives a more accurate situation, said the chief scientist of the panel of COVID-19 Advisors in Ontario.

This report by Canadian Press was first published on May 20, 2022.



According to experts, the presence of BA.2.20 in Ontario does not guarantee serious concern.

Source link According to experts, the presence of BA.2.20 in Ontario does not guarantee serious concern.

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