Mark Garcia, on NASA’s ISS blog:
Cassidy then joined Roscosmos Flight Engineers Anatoly Ivanishin and Ivan Vagner for an emergency drill after lunchtime. The trio practiced CPR techniques necessary in microgravity. The crewmates also reviewed medical hardware, communication and coordination in the event of a medical emergency aboard the orbiting lab.
Probably not a bad idea, because of those positive tests for COVID-19 at Baikonur. Luckily they’ve been up there for a while and all seems fine.