How close are we to a COVID-19 vaccine? What Pfizer's early results mean for Canadians

Pfizer and BioNTech announced Monday that their vaccine candidate against COVID-19 has shown promising preliminary results in Phase 3 clinical trials. How close are we to getting the vaccine? What needs to happen first? And what kind of vaccine is this anyway? Here are some answers. 

from CBC | Health News https://ift.tt/2JS6a61