COVID-19 vaccine can fend off a live sample of the novel coronavirus, which has killed more than 27,500 Canadians.The research, which is being overseen by professors Andrés Finzi and Daniel Kaufmann from the Université de Montréal, could help answer key questions scientists around the world are grappling with: who needs a third shot of the COVID-19 vaccine?
And when might they need it?Finzi and Kaufmann’s teams are following a small group of healthcare workers, just over 40, half of whom were previously infected with COVID-19, the other having never encountered the virus — all of whom received two doses of the Pfizer-BioNTech vaccine.Their findings show the vaccine produces a robust immune response and is holding up against infections.“Up.