Kusanthula kwa CNN kukuwonetsa kuti kuyesa kwa Covid-19 antigen sikuphatikizidwa m'maboma ena

(CNN) Chiwerengero chonse cha milandu ya Covid-19 m'maboma ena sichikuphatikizanso zotsatira za mayeso a antigen - ngakhale monga momwe bungwe la US Centers for Disease Control and Prevention lalimbikitsa.