Two hundred and three people have been hospitalized and 53 people have died from COVID-19 after receiving an injection of the vaccine, PHAC added.
PHAC data breaks down the number of COVID-19 cases, deaths and hospitalizations reported after a person receives the first dose in a series of two doses.
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The figures show that a “vast majority of cases occur in unvaccinated people and support the benefits of the extended second dose strategy,” a PHAC spokesperson told Global News in an email.
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As of April 26, 6,789 people who had previously received an injection of a COVID-19 vaccine were infected with the coronavirus, according to PHAC. Most of these cases – 4,517 – were reported within 14 days of the first dose of vaccine. The remainder – 2,274 – were reported more than two weeks after the first dose. This represents 1.3% of the cases reported since the vaccine was deployed in December, according to PHAC.
The Pfizer and Moderna vaccines are about 60 to 80 percent effective at preventing COVID-19 infection three to four weeks after receiving a single dose, according to Public Health Ontario.
Hospitalizations and deaths
Of the 2,274 people who contracted cases of COVID-19 within two weeks of a vaccine, 9.3% of people were hospitalized and 2.4% died, the data showed.
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Two weeks after receiving a dose of a coronavirus vaccine, people received “significant protection” from hospitalization and death compared to unvaccinated people, PHAC said.
“Real-world data has shown about 80 percent protection against hospitalization with the first dose of a two-dose series,” the Canadian Health Agency said.
- Fifty-eight percent of the 203 hospitalizations were in people aged 80 and over.
- Twenty-two percent were aged 70 to 79.
- Eight percent were between 60 and 69 years old.
- Twelve percent were between the ages of 20 and 59.
Of the 203 people hospitalized, 77% received the Pfizer vaccine, 22% the Moderna vaccine and 1% the Covishield vaccine.
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These numbers could be affected by the different distribution locations and the timing of vaccine deployment, PHAC noted. For example, during the initial rollout, the Moderna vaccine was widely distributed to First Nations across the country and AstraZeneca / Covishield was not distributed until early March.
- Ninety-one percent of the 53 deaths were in people aged 80 and over.
- The remaining nine percent were between 50 and 70 years old.
Sixty-four percent of deaths occurred after a dose of Pfizer vaccine and 36% after a dose of Moderna.
People died within 22 to 62 days of the first vaccination, PHAC said, adding that data was only available for 57% of deaths.
“Vaccines are never 100% effective in preventing disease, so we would expect to see cases of COVID-19 after vaccination,” PHAC said. “Surveillance data from the Public Health Agency of Canada indicates that the percentage of breakthrough cases is low.
As of Monday, 13.9 million Canadians received at least one dose of the coronavirus vaccine. To date, 1.2 million cases of COVID-19 have been reported in Canada.
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