What does COVID-19 vaccine effectiveness mean?

With the announcement of vaccine progress coming out of the biotech firm Moderna, residents in the U.S. could see distribution of the vaccine within a matter of weeks.

Pfizer to start testing COVID-19 vaccine in kids

Last week, Pfizer Inc. received permission to test its vaccine in U.S. kids as young as 12, one of only a handful of attempts around the world to start exploring if any experimental shots being pushed for adults also can protect children.