Janssen single-dose covid-19 vaccine is less effective against delta and lambda variants second doseAccording to an American study published on Wednesday.
The study, released by New York University, has not been reviewed or published in a scientific journal, and was conducted from a series of laboratory experiments with blood samples, which means it does not reflect the actual application of the vaccine to humans.
However, the study authors suggest that people who have been vaccinated with a single dose of this vaccine, which is produced by Janssen Laboratories, a subsidiary of the multinational company Johnson & Johnson, should receive a booster vaccination, preferably with the Pfizer or Moderna vaccine.
These conclusions contrast with recent studies published by Johnson & Johnson, which indicated a أشارت High vaccine efficacy against COVID-19 and the delta variantup to eight months after vaccination.
“The message we want to send is that people never stop taking Fakina da Johnson & JohnsonVirologist Nathaniel Landau, who led the study, said, citing the paper, New York times.
At a Senate hearing on Tuesday, the director of the US Centers for Disease Control and Prevention, Rochelle Walinsky, said the delta variant of COVID-19, which is more contagious, currently accounts for 83% of infections in the United States. .
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