More than 80% of Americans 16 and older have some immunity to coronavirus, blood survey finds

The dramatic rise in Covid-19 cases and hospitalizations due to the more transmissible Delta variant is significantly impacting all age groups, particularly Americans ages 11 or younger who are not yet eligible to receive vaccinations.

The dramatic rise in Covid-19 cases and hospitalizations due to the more transmissible Delta variant is significantly impacting all age groups, particularly Americans ages 11 or younger who are not yet eligible to receive vaccinations.