ROME - A nurse at a hospital in Italy accidentally gave a 23-year-old woman four doses of the Pfizer-BioNTech COVID-19 vaccine all at once, though the patient didn’t suffer any apparent adverse reaction, according to news reports.
The incident was reported Sunday at a hospital in the town of Massa in northwestern Tuscany. Italian health authorities initially said the woman had received six doses, but later clarified on Tuesday that it had actually been four doses of the vaccine, the Agence France-Presse reported.The Pfizer vaccine is packaged as a concentrate that must be diluted with saline solution.