Few Canadians contract COVID-19 after first dose of vaccine: PHAC – fr

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Few Canadians contract COVID-19 after first dose of vaccine: PHAC – fr


TORONTO – The Public Health Agency of Canada (PHAC) says there have been 6,789 confirmed cases of COVID-19 in those who received the first dose of a vaccine in more than 13 million people who have been vaccinated.

In an emailed statement to CTVNews.ca, PHAC said 4,515 of these cases were reported within 14 days of vaccination and 2,274 cases were reported at least 14 days after receiving the first dose.

Among the reported cases, PHAC said a relatively small number resulted in severe COVID-19 or death.

“As of April 26, of the 2,274 cases reported above for which outcome information was available, 203 cases of COVID-19 had been hospitalized and 53 cases had died due to COVID-19,” said the agency Monday.

According to data tracked by CTVNews.ca, more than 13 million Canadians received the first dose of a COVID-19 vaccine on Tuesday morning.

Experts say it is rare to get sick after being vaccinated, but note that infection is still possible.

Infectious disease expert Dr Abdu Sharkawy previously told CTVNews.ca that “immunity needs time to build after vaccination.” He said that was the reason Canadians are urged to continue to follow public health measures, including physical distancing, frequent hand washing and wearing a face mask.

“One is most susceptible in the immediate short-term period following vaccination… to infection due to incompletely established immunity,” said Sharkawy. He added that the time to establish immunity after each dose varies from two to 12 weeks depending on the health of the person receiving the vaccine and the vaccine itself.

Despite the possibility of infection after vaccination, Sharkawy said that does not mean that vaccines are ineffective or that people should not be vaccinated.

“Vaccines protect and do it very well in the vast majority of cases, but it takes time for our immune system to put in place an adequate response. We need to be aware of this before judging a vaccine as ineffective, ”he said.

Although vaccines are not 100% effective, infectious disease specialist Dr Isaac Bogoch previously told CTV News Toronto that PHAC data underscores the benefits of getting first doses into the arms of people. Canadians as quickly as possible.

Bogoch said this shows that a dose provides a layer of protection against COVID-19.

“You don’t get the same level of protection as having two doses of the vaccine. That said, that’s still pretty significant protection, and depending on the data you’re reading, you’re protected from hospitalization after a single dose anywhere about 60 to 80 percent, “Bogoch said.

Even if a person were to get sick after receiving the first dose of a COVID-19 vaccine, Dr. Zain Chagla, an infectious disease specialist at McMaster University in Hamilton, Ont., Says the patient will be better off than his he had not received a dose.

“Anecdotally, people who are in the hospital after their first dose – where it is injected – are much less sick than they might be. These are people you expected to do worse, ”Chagla said in an interview with CTV. Toronto News.

Although infection after the first dose is a rare possibility, experts say it is also possible that some Canadians may become infected with COVID-19 after being fully vaccinated.

University of Manitoba virologist Jason Kindrachuk told CTVNews.ca in March that these so-called breakthrough infections are expected because not everyone will have an immune response to vaccines.

“When we look at the people who are vaccinated, there will be this contingent of people who will not mount a strong enough response to fully defend themselves against infection and / or disease development,” Kindrachuk said.

However, Kindrachuk said these infections are generally not of concern.

“These cases are always the exception and not the norm, and we have to keep in mind the number of infections that we have seen and, in this case, the number of vaccinations given,” he said.

Kindrachuk added that the likelihood of rupture infections will decrease as more of the population is vaccinated.

He explained that if a sufficiently large number of Canadians are vaccinated against COVID-19, a single breakthrough infection is unlikely to lead to a large chain of transmission or to recirculate the virus, as communities will already have established “this. buffer from people who actually do it. have protection. “

“The more vaccinated people around them [breakthrough infections], the less chance there is that this virus will start to circulate again in the community and make people sick, ”Kindrachuk said.

With files from CTV News Toronto

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