"Now that we have safe, effective vaccines, we can give people immunity without causing dangerous disease. That puts us into a global race against the virus. The more people who see the vaccine before they see SARS-CoV-2, the fewer severe cases, long-term health problems, and deaths. Faster worldwide rollout will save lives. It really is that simple."
A great explanation of why it's the novelty of the coronavirus that makes it deadly and explains some of its seemingly unique properties.
Insight