Moderna Inc. has agreed to do a placebo-controlled trial of its new Covid vaccine that was recently approved by US regulators, Health and Human Services Secretary Robert F. Kennedy Jr. said Tuesday.

By Stephanie Brown HealthDay ReporterTUESDAY, June 3, 2025 (HealthDay News) -- The U.S. Food and Drug Administration has approved a new lower-dose vaccine for active immunization against COVID-19 caused by severe acute respiratory syndrome coronavirus 2.

U.S. Health and Human Services Secretary Robert F. Kennedy Jr. said on Tuesday that Moderna has agreed to a true placebo-controlled trial of its new COVID-19 vaccine. While noting that he was aware of concerns about the Food and Drug Administration's limited approval of the new mRNA vaccine for high-risk populations,