Senior leaders at the FDA began pushing Moderna and Pfizer to file for full, formal approval of their COVID vaccines for children last summer.

When the Department of Health and Human Services (HHS) announced a new requirement for placebo testing on all new vaccines last week, the agency suggested the move would help protect consumers. But medical experts and vaccine makers say wide application of the rule would be an unnecessary drain on time and money,

Kennedy Jr pledged last week that his department will now require all new vaccines to be tested in placebo-controlled trials before being licensed for use. In a statement first given exclusively to the Washington Post,