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Covid-19 roundup: Boosters for kids, CAR-NK cell therapy, Paxlovid rebound & more

Pfizer and BioNTech reported positive clinical data for a Covid-19 booster in children younger than 5, results released ahead of a June FDA advisory committee meeting scheduled to discuss the use of that vaccine and Moderna’s in kids. In other Covid news this week, the CDC issued a health advisory for Pfizer’s antiviral Paxlovid and a respiratory failure drug for Covid-19 flunked its clinical trial.