Uhlalutyo lwe-CNN lubonisa ukuba uvavanyo lwe-antigen ye-Covid-19 alufakwanga kwiimeko kwamanye amazwe

(CNN) Inani lilonke leemeko ze-Covid-19 kwamanye amazwe ayikabandakanyi iziphumo zovavanyo lwe-antigen-hayi njengoko kucetyiswa ngamaZiko oLawulo lweSifo kunye noThintelo e-US.