Doses of the Pfizer-BioNTec vaccine, in Dijon, the 26 December 2020. (illustration) – PHILIPPE DESMAZES-POOL / SIPA
It was on Christmas Eve that the first symptoms appeared. A nurse from 27 years working in a unit Covid – 14 from a hospital in San Diego (United States) tested positive for coronavirus on Saturday 20 December. However, the practitioner had received a dose of the vaccine developed by the Pfizer laboratory eight days earlier, reports the American channel ABC News San Diego .
The nurse was one of the priority people since the launch of the vaccination campaign in the United States. It was only a little over a week after the injection that he experienced symptoms characteristic of the coronavirus: chills, muscle aches and great fatigue.
He had not yet received the second dose of the vaccine
Should we be concerned about the effectiveness of
vaccines after the announcement of this contamination? No, replied the specialist in infectious diseases Christian Ramers, interviewed by the American channel. According to him, it is possible that the nurse was infected before receiving his first dose of the vaccine since the incubation period can last up to two weeks. In addition, the practitioner had only received a first injection of Pfizer’s vaccine. “We believe that this first dose gives you approximately 45% protection and you need a second dose to reach 50% ”, specifies the American specialist. “We know from clinical trials on vaccines that it takes approximately at 14 days to start developing protection, ”he adds.