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Vaccinated US nurse contracts Covid, expert says Pfizer shot needed more time to work: Report

Matthew W., 45, a nurse at two different local hospitals, said in a Facebook post on December 18 that he had received the Pfizer vaccine, telling the ABC News affiliate that his arm was sore for a day but that he had suffered no other side-effects.

By: Reuters | Updated: December 30, 2020 5:49:49 pm
Pfizer vaccine emergency use, WHO, coronavirus vaccine, Pfizer biotech vaccine emergency use, covid 19 vaccine, Pfizer vaccine emergency use, indian expressEvery country that has a drug regulatory agency will have to issue its own approval for any COVID-19 vaccine, but countries with weak systems usually rely on WHO to vet the shots. (Express File)

A nurse in California tested positive for COVID-19 more than a week after receiving Pfizer Inc’s vaccine, an ABC News affiliate reported on Tuesday, but a medical expert said the body needs more time to build up protection.

Matthew W., 45, a nurse at two different local hospitals, said in a Facebook post on December 18 that he had received the Pfizer vaccine, telling the ABC News affiliate that his arm was sore for a day but that he had suffered no other side-effects.

Six days later on Christmas Eve, he became sick after working a shift in the COVID-19 unit, the report added. He got the chills and later came down with muscle aches and fatigue.

He went to a drive-up hospital testing site and tested positive for COVID-19 the day after Christmas, the report said.

Christian Ramers, an infectious disease specialist with Family Health Centers of San Diego, told the ABC News affiliate that this scenario was not unexpected. “We know from the vaccine clinical trials that it’s going to take about 10 to 14 days for you to start to develop protection from the vaccine,” Ramers said.

“That first dose we think gives you somewhere around 50%, and you need that second dose to get up to 95%,” Ramers added.

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