What is serosurveillance and why is it important?
Serosurveillance is a common way of seeing how many people have been previously infected with a certain infectious agent, in this case SARS-CoV-2, the virus causing COVID-19. Blood samples from hundreds of thousands of Canadians are currently being tested to check levels of antibodies, which suggest a past infection. Serosurveillance can also help determine priority groups for vaccination and will be used to monitor the effectiveness of vaccines.
What does “vaccine surveillance” mean?
Vaccine surveillance includes studies of vaccine effectiveness (how good vaccines are at preventing severe disease, new infections, and transmission) and safety (identifying and quantifying the vaccine adverse effects). Although vaccines go through numerous trials before being approved for use, it is crucial to monitor their effectiveness and safety within a broader population and with various population groups (children, pregnant women, elderly, etc.).
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