In "A Period of Transition," Dr. Osterholm and Chris Dall discuss the latest COVID-19 trends in the U.S. and around the world, a recent study on long COVID, and the rise of measles cases in the United States. Dr. Osterholm also provides an update on influenza and RSV cases in the U.S. and shares the latest "This Week in Public Health History" segment.  Persistent complement dysregulation with signs of thromboinflammation in active long COVID (Cervia-Hasler et al., Science)Lighting up long COVID (Eric Topol, Ground Truths)Follow up, funding critical on long COVID (Jill Burcum, Star Tribune)Does Paxlovid prevent long COVID? Maybe, experts suggest (Stephanie Soucheray, CIDRAP News)