The health department did not provide details on how the proposed changes will be enforced or to which vaccine trials they will apply.

U.S. Health and Human Services Secretary Robert F. Kennedy Jr intends to shift the way vaccines are tested, The Washington Post reported on Wednesday, citing a spokesperson from the HHS. The potential

The Department of Health and Human Services says it will require new vaccines to be tested against a placebo, which could complicate and delay Food and Drug Administration approval of many vaccines.