Thread by @DrEricDing

📍JUST IN—FDA is planning to allow people to receive a different #COVID19 vaccine as a booster than initially received. Recent NIH study shows J&J recipients who got a Moderna booster saw antibody levels ⬆️76-fold in 15 days, vs 4x after an extra J&J shot.
nytimes.com/2021/10/18/us/…

2) Federal regulators this week are aiming to greatly expand the number of Americans eligible for booster shots. The F.D.A. is expected to authorize boosters of the Moderna and Johnson & Johnson vaccines by Wednesday evening; it could allow the mix-and-match approach by then.

3) An advisory committee of the Centers for Disease Control and Prevention will take up the booster issue on Thursday; the agency will then issue its own recommendations. By the end of the week, tens of millions more Americans could be eligible for extra shots.

4) The study presented to the F.D.A.’s advisory panel last week, conducted by the National Institutes of Health, suggested that Johnson & Johnson recipients might benefit most from a booster shot of the Moderna vaccine.

5) A shot of the Pfizer-BioNTech vaccine also raised the antibody levels of Johnson & Johnson recipients more than Johnson & Johnson did, the study found, although not as much as Moderna did.

6) This stronger effect of Moderna is also seen in studies of #MultipleMyeloma cancer patients. Moderna helped patients mount a 6x higher antibody response than 2 shots of Pfizer.

https://twitter.com/drericding/status/1450187178731053065