Responding to a question about the safety and efficacy of the approval process for Moderna and Pfizer COVID-19 vaccines for children under five, U.S. Chief Medical Advisor Dr. Anthony Fauci provided reassurances that both have undergone the “gold standard” of trials. “The bottom line of all of this is that the FDA evaluation and analysis of safety, effectiveness and manufacturing data were very rigorously and comprehensively looked at,” Dr. Fauci said.