Covid-19: when immunizing is not enough

TORONTO – About 7,000 Americans and 450 Canadians who were fully vaccinated have died of Covid-19. Among Americans, the death of Colin Powell, the former secretary of State – who died on Monday from complications from Covid-19 despite being fully vaccinated – shocked everyone. A news that has been around the world and that has given the opportunity to the experts to explain why this can happen and why the vaccine is extremely important as it protects oneself and others from the disease.