Study: Johnson & Johnson Vaccine May Be Less Effective Against Delta COVID-19 Variant

Source: New York Times

“The coronavirus vaccine made by Johnson & Johnson is much less effective against the Delta and Lambda variants than against the original virus, according to a new study posted online on Tuesday. Although troubling, the findings result from experiments conducted with blood samples in a laboratory, and may not reflect the vaccine’s performance in the real world. But the conclusions add to evidence that the 13 million people inoculated with the J.&J. vaccine may need to receive a second dose — ideally of one of the mRNA vaccines made by Pfizer-BioNTech or Moderna, the authors said. … The new study has not yet been peer reviewed nor published in a scientific journal. But it is consistent with observations that a single dose of the AstraZeneca vaccine — which has a similar architecture to the J.&J. vaccine — shows only about 33 percent efficacy against symptomatic disease caused by the Delta variant.” (07/21/21)

https://www.nytimes.com/2021/07/20/health/coronavirus-johnson-vaccine-delta.html