 Dr Albert Bourla ukuriye Pfizer yagize ati: Turi hafi guha abatuye isi igisubizo gikenewe cyane mu gufasha kurangiza ibi bihe byakaga mu buzima ku isi. Prof Ugur Sahin, umwe mu bashinze BioNTech yo mu Budage, we yavuze ko ibyo bagezeho ari intambwe ikomeye. 