Do you think COVID-19 is immune after getting sick? Maybe not, new research shows

According to a new study compiled by the Canadian COVID-19 Immune Task Force, at least 40% of Canadians are infected with the Omicron variant ofCOVID-19. ..

However, despite this "Omicron Tsunami" in Canada, Task Force experts call itnew data,COVID. It shows that not all people who get sick in -19 develop immunity from infection.

In fact, one in eight people infected with the virus is ill and does not produce antibodies in the blood. Also, data released in June show that children are halved in their chances of developing immunity from infections.

"So forget to go to some sort of'COVID party'," said Catherine Han, a professor at McGill University School of Medicine and co-chair of the COVID-19 Immunity Task Force in Canada. Dr. Kins said.

"Infection is not a viable strategy for achieving or maintaining immunity."

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This is just one of many findings from research funded by the COVID-19 Immune Task Force, including how the virus caused a pandemic. Provides new insights into. Is evolving and how does this affect the immunity provided by vaccines and infections?

The Task Force, consisting of scientists and experts from universities and hospitals across the country, was established by the federal government in April 2020. Its mission is to determine the extent of COVID-19 infection in Canada, learn how the infection affects immunity, and provide government and decision makers with information about the virus based on data and research. is.

In recent months, Task Force data have revealed that Omicron and its derivatives avoid immunity, whether from vaccination or previous infections. It means that you have developed a powerful ability to do.

Therefore, infected with COVID-19 One should not think that it is now. Immunity.

"One in eight people do not show antibodies in their blood, so they are not responding to the vaccine. And if they get infected, there's no evidence of that ... so I'm not sure what's going on, "Hankins said.

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That's why Canadians understand that COVID-19 hasn't disappeared and that it's changing. It is important to do. -Infects people, she added.

A study conducted by a team led by Professor Michael Grant shows that people infected with the virus before the first COVID-19 vaccine ended up with the strongest protection against the virus. There is also new data. Vice Dean of Immunology and Biomedicine at Memorial University. 

This is what is known as "hybrid immunity".

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His study, which began in June 2020, examined patients who had been infected with the original virus strain prior to vaccination and found that vaccinated patients did not get sick. We compared the immune responses.

"We have found that people who have been infected and vaccinated before have shown a very strong immune response to the vaccine," he said.

"After the first injection of the vaccine, they have higher levels of antibodies than naive people. (People who didn't get sick were after two vaccinations."

Grant's team was also infected with early strains of the virus, such as the original strain and the delta variant. We found that the more severe the infection, the stronger the immune response and vice versa .. This provides increased protection against the virus after the sick person recovers. It means that it was done.

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Grant says that this is not the case for Omicron and its subvariants.

If an individual develops an antibody as a result of an Omicron infection, the disease causes it. The level of immunity provided is very low and remains vulnerable to future or repeated infections.

"Two doses and subsequent Omicron infections are three vaccines. There is a general consensus that it is about as good as vaccination, "Grant said.

" But the infection is mild because it is vaccinated or because the virus is less virulent. Because of this, it does not seem to stimulate a stronger immune response than previous infections. "

Overall, current COVID-19 vaccines infect new variants of the virus. Although not prevented, there is strong scientific evidence that vaccines prevent serious illness and death.

Future health authorities challenges are recognized by the public and individuals. Is to ensure that the vaccine is kept up to date. Studies funded and edited by the Task Force so far are COVID- Hankins said it shows that immunity to 19 diminishes over time.

"It's important for people to understand that these new variants are sitting ducks, even if they had them before, not paying attention to the fact that they had them before. I think, and if your immunity has expired, you don't have the immunity you had closer when you got your vaccine, "she says. I did.

"So it's really important to get that booster."

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