Johnson & Johnson’s Covid-19 vaccine is highly effective in preventing severe disease and death from the Delta variant, according to a South African clinical trial of nearly 480,000 healthcare workers
Johnson & Johnson ’s Covid-19 vaccine is highly effective in preventing severe disease and death fromThe results from the trial of nearly 480,000 healthcare workers mark the first real world test of J&J’s single-dose vaccine against the Delta variant andthe company released last month showing the single-dose vaccine offers good protection against the highly contagious strain.
The South African study, known as Sisonke, found that the J&J vaccine has an efficacy of up to 71% against hospitalization from the Delta variant, 67% against hospitalization from the Beta variant and up to 96% against death, according to a presentation of the results Friday. The data hasn’t yet been peer reviewed or published in a scientific journal.
“The vaccine works very well in South Africa and protects against severe disease and death. All the immune responses that we’ve seen indicate good, immediate and sustained immune response against Delta and we see surprising durability in immune response of up to eight months,” said Dr. Glenda Gray, one of the study’s lead researchers.
The results are likely to inform a continuing debate about booster doses, coming out against the backdrop of another study that suggested theagainst the Delta variant. The San Francisco Department of Public Health and Zuckerberg San Francisco General Hospital and Trauma Center said earlier this week they would offer booster doses of shots from Pfizer Inc. and partner BioNTech SE or Moderna Inc. to people who received Johnson & Johnson’s single-dose shot.
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