Vials with a sticker reading, "COVID-19 / Coronavirus vaccine / Injection only" and a medical syringe are seen in front of a displayed Johnson & Johnson logo in this illustration taken October 31, 2020.
REUTERS/Dado Ruvic//File PhotoSouth African health inspectors will carry out further checks on a batch of Johnson & Johnson (JNJ.N) COVID-19 vaccines following a contamination error earlier this year at the U.S. plant where the doses were produced, the health ministry said.
"There is now a real possibility that they may not be, however this is for the regulator to rule on," a ministry statement said.
read moreManufacturing at the Baltimore plant owned by Emergent Biosolutions Inc (EBS.N) was halted in April after the discovery that ingredients from AstraZeneca's (AZN.L) COVID-19 vaccine, also being produced at the plant at the time, had contaminated a batch of J&J's vaccine.
read moreAn inspection by the FDA also turned up a long list of sanitary problems and bad manufacturing practices at the Emergent plant.
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