FDA panel takes up tough questions on J&J Covid-19 boosters

U.S. health advisers on Friday tackled who should get boosters of Johnson & Johnson's single-shot COVID-19 vaccine and when - and whether using a competing brand for the second dose might provide better protection. The push for boosters kicked off last month after the Food and Drug Administration authorized third doses of the Pfizer vaccine for seniors and younger adults with health problems, jobs or living conditions that place them at higher risk from the coronavirus. On Thursday, an FDA advisory panel unanimously recommended a half-dose booster of the similar Moderna vaccine for the same groups. Friday, the same panel discussed a booster of J&J's vaccine but the decision is more complex. Moderna and Pfizer asked the FDA to OK boosters at least six months after immunization, but J&J proposed a sliding schedule with an extra dose as early as two months later. Adding another twist, the experts also will discuss preliminary data from a government mix-and-match study that ...

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