 Ka sokow shirkadda Bill Melinda Gates, oo ay la gashay heeshiis qiimihiisu yahay 750 milyan oo doolar, ayaa haddana waxaa jira in shirkadda AstraZeneca ay heshiis kale la gashay Machadka Serum ee dalka Hindiya, kaas oo soo saara tirada ugu badan ee tallaaka. 