Tweet from sfchronicle at August 25, 2021 at 07:36AM

The delta variant has forced a quick pivot on key pandemic rules, from indoor masking to booster shots.

But what about the guideline on what defines a “close contact” with an infected person? https://t.co/PHW69wjLyK

— San Francisco Chronicle (@sfchronicle)
Aug 25, 2021

from http://twitter.com/sfchronicle