Hosted by Jane Pauley. In our cover story, correspondent Martha Teichner looks at the race to develop a COVID-19 vaccine. Plus: Rita Braver finds out how some regional theatres that are reopening are making big changes to accommodate social distancing; Faith Salie reflects on the "K-word" all too common on social media these days – calling someone a "Karen"; Mo Rocca talks with chef, restaurateur and Food Network host Guy Fieri; Tracy Smith visits with Lizzo, who talks about overcoming bouts of poverty, homelessness, and crippling self-doubt; Lee Cowan checks in with Chicago street artist Jim Bachor, who fills potholes with colorful mosaics; Pauley looks at how deep spring cleaning has swept the country thanks to stay-at-home orders; documentary filmmaker Ken Burns looks at the role that baseball has played in American society, especially in times of crisis; and we present Seth Doane's award-winning 2019 report about the "Cemetery Angel," Ruth Coker Burks.