Canadians were advised by NACI to take the first shot offered.
But if the vaccines retain their ability to prevent severe disease then hospitalisations will not rise as fast as they have previously.
We believe a booster dose will likely be necessary to maintain highest levels of protection against.
Delta Variant: Vaccine Efficacy for Pfizer, Moderna, Astrazeneca
The important thing to remember is that a second dose with AstraZeneca, Pfizer or Moderna is better than no second dose at all.
AstraZeneca• Show subsections• I know how bad the Canadian health system is.
The numbers can also vary because they depend on other factors, including what you're measuring, when you measure it, the age of the population you're measuring it in, and whether people have had previous COVID-19 infections.
(JuSun/iStock/Getty Images) HEALTH AstraZeneca Scientist Says Delta Variant Makes Herd Immunity Impossible. Here's Why MARIANNE GUENOT, BUSINESS INSIDER 12 AUGUST 2021 The Delta variant has changed the equation for achieving herd immunity, the developer of the Oxford/AstraZeneca vaccine has said.
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