Janssen (Johnson & Johnson) vaccine is far less effective against the delta variant than against the original coronavirus, the preliminary results of a Tuesday published study, which include The New York Times reported.
The Janssen vaccine, for which only one prick is used, produces relatively few antibodies to the delta variant, according to the study, which has not yet been published in a scientific journal. Researchers at the University of New York concluded that the drug produces about five times less protective antibodies against this mutant than against the unmutant lung virus.
“We dont want to discourage people from taking the Janssen vaccine, but we hope that in the future it will be possible to get a second shot, from Janssen himself or from Pfizer or Moderna,” says virologist Nathaniel Landau of the University of New York, who has the led study, against The New York Times.
According to the study, Pfizer and Moderna vaccines also produced relatively fewer antibodies to the delta variant, but this difference would be less significant.
The US health authorities reported on Tuesday that 83 percent of the new corona cases are the more contagious delta variant in the United States. At the beginning of the month, that was about 50 percent.