Rau Tus Kws Kho Mob: Pfizer muaj ntau cov ntsiab lus zoo thiab qhov tsis zoo, raws li tau hais hauv koj zaj dab neeg "Pfizer Tsiv dhau Covid. Vim li cas Nws Tshuag Yog Kev Yuav. " (Lub Ob Hlis 3). Tab sis qhov nyuaj tshaj plaws los daws nrog rau tag nrho bio ...