https://www.siliconvalley.com/2021/02/27/7866081/

The Food and Drug Administration on Saturday issued an emergency authorization for a COVID-19 vaccine developed by Johnson & Johnson, accelerating the nation’s campaign to protect large swaths of the American public as quickly as possible.

The addition of a third vaccine in the U.S. means that more than 100 million people – nearly one-third of the U.S. population – could be vaccinated by the end of March, easing a re-opening of the economy and nudging us closer to long-awaited “herd immunity.”