.@Merck CEO Ken Frazier speaking @HarvardHBS: Critical 2 have #vaccine asap, however best way protect yourself are good #hygiene, use mask, #SocialDistancing. $MRK #COVID19 #coronavirus #health #safety #drugs $JNJ $AZN $PFE $GSK $MRNA $NVAX @HBSAlumni #business #money #Stock