This delta variant of the coronavirus seems to really be screwing us over. Cases are spiking in the U.S., and we keep hearing about vaccinated people getting Covid. So how worried should we be? And what is it about delta that makes it so sneaky? We talk to public health supervisor Katarina Grande and virologist and immunologist Professor Ann Sheehy to find out.

Here’s a link to our transcript: https://bit.ly/37Cn9la 

UPDATE 8/25/21 : In a previous version of this episode, we used the word "infected" when it would have been more accurate to use the phrase "get sick." The episode has been updated.

This episode was produced by Meryl Horn with help from Rose Rimler, along with Nick DelRose, Michelle Dang and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Fact checking by Ekedi Fausther-Keeys, Michelle Dang and Nick DelRose. Mix and sound design by Bumi Hidaka. Music written by Peter Leonard, Marcus Bagala, Emma Munger and Bobby Lord. Thanks to the researchers we got in touch with for this episode, including Professor Michael Toole, Dr. Kathryn Stephenson and Dr. Barnaby Young.