J&J recipients who were administered Moderna or Pfizer boosters showed significantly higher antibody counts compared to those who received a booster of the same vaccine.
on mixing and matching Covid-19 vaccines featured 458 adults who received one of the three U.S. approved vaccines—Pfizer, Moderna or J&J—and received booster shots later.Among people who originally received a J&J shot, antibody levels were four times higher after a J&J booster, 35 times higher after a Pfizer booster and 76 times higher after a Moderna booster.
The study also found that Moderna recipients had higher antibody levels “irrespective of the booster vaccine administered,” when compared with those who had initially been inoculated with the Pfizer or J&J vaccine.14.9 million. That’s the total number of people in the U.S. who have received the single dose J&J Covid-19 vaccine,
the Centers for Disease Control and Prevention . The CDC’s tracker also shows that 10,029 people have received a J&J booster dose even though this has not been formally approved by the FDA.The NIH-funded study’s findings and the FDA’s mixed review of J&J’s booster shots data may lead to debates about what booster shots will be offered to nearly 15 million recipients of the single-dose vaccine.
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