Covid-19 herd immunity is a difficult target, experts warn, but vaccinating teens could be key to protecting us this fall
A Philadelphia physician raised $500,000 and is sending oxygen tanks to help India battle its Covid crisis
3 states have already reached Biden's new vaccination goal, but vaccine hesitancy may make it challenging for others
Judge says CDC doesn't have authority to issue an eviction moratorium. It's unclear what happens next
Miami private school asks teachers not to get Covid-19 vaccine or they won't be allowed to return next year
