Covuity ke lebitso la letšoao la letšoao la ente ea Pfizer Covid-19.
Babuelli ba Biontech le Pfizer ba qalile ho kenya likopo tse ngata ho tiisa mabitso a Covuity le Rnaxcovi lefats'eng ka bophara.. Mantsoe ana ka bobeli a bua ka Covid 19, 'me ea morao-rao o fana ka hlooho ho ts'ebetso e ikhethang ea mahlale e thusang ho fumana boits'ireletso ho vaerase.