It’s time to appoint medical directors in assisted living, panel says … UK COVID variant 64% more deadly … Thousands of bottles of Lipitor generic pulled over impurity fears … Scientists detect Parkinson’s in skin swab with 85% accuracy … CDC: Virus was 3rd leading cause of death in 2020, deadliest in U.S. history … First subjects receive Moderna vaccine altered to fight S. Africa variant … FDA-approved antibody therapy cuts COVID risks by 87%, new trial data show