A new study found that the Janssen COVID-19 vaccine produced by Johnson & Johnson is less effective against the more infectious variants of Delta and Lambda.
in a Preprint published on bioRxiv On Tuesday, researchers suggested that people receiving a single dose of Johnson & Johnson’s COVID-19 vaccine may need to be injected with mRNA vaccines produced by Pfizer BioNTech or Moderna to enhance protection against COVID-19 variants.
“The message we want to convey is not that people shouldn’t get the Johnson & Johnson vaccine, but we hope that in the future, it will be boosted by another vaccine from Johnson & Johnson. Or Pfizer or Moderna,” New York University Gross, who led the research Said Nathaniel Landau, a virologist at the Mann School of Medicine.
This new study is consistent with previous observations, which showed that a single-dose AstraZeneca vaccine uses ingredients similar to those found in the Johnson & Johnson vaccine and is only 33% effective against the Delta variant.
However, the preprint contradicts a smaller study, which found that a single dose of Johnson & Johnson vaccine is still highly effective against the more infectious B.1.617.2 Delta variant after more than half a year of vaccination.
Dr. Dan Barouchm, a virologist at the Beth Israel Deaconess Medical Center in Boston, said in a press release: “The coverage of these variants will be better than people expected.” New York Times Report.
The Delta variant is currently the most contagious variant of COVID-19 known. Dr. Rochelle Varensky, director of the US Centers for Disease Control and Prevention, said on Tuesday that this variant was originally discovered in India and now accounts for 83% of all sequenced COVID-19 cases in the United States. NBC Finance Channel.
In the Senate hearing, Varensky pointed out that low vaccination rates in several counties in the United States have led to the rapid spread of this highly infectious variant.
On Monday, officials at Houston Methodist Hospital in Houston, Texas, also reported the state’s first Lambda variant case.This variant is currently designated as the “variant of interest” and it was first discovered in Peru, accounting for 81% of all COVID-19 cases, according to reports ABC News.
It is not clear how to spread Lambda variants Yes, but experts point out that it carries many mutations, one of which makes it better to evade vaccines than other strains.
To date, COVID-19 has claimed the lives of more than 4,114,260 people worldwide and infected 191,386,140 people. According to data from Johns Hopkins University, in terms of the number of cases and deaths, the United States is the worst-hit country in the world, with 34,173,249 cases and 609,525 deaths recorded so far.
The new U.S. FDA warning label is a further blow to Johnson & Johnson. Johnson & Johnson received an emergency use authorization in February 2021, but played a secondary role in the U.S. coronavirus immunization campaign.
Photo: AFP/Mark Ruston
