The Food and Drug Administration blocked the publication of studies that tracked the safety of the COVID-19 and shingles vaccines, an official told ABC News.
The American Academy of Pediatrics said on Tuesday that children ages 6 months to 23 months should receive a COVID-19 vaccine, in contrast with federal health officials.
The suspected gunman who attacked the Centers for Disease Control and Prevention's campus on Friday may have fired many hundred rounds, law enforcement said on Tuesday.
The mRNA vaccines are credited with slowing the 2020 coronavirus pandemic.
Updated guidance on the CDC website appears to be walking back some of the changes for healthy children and pregnant women that RFK announced earlier this week.
Scientists at Stanford have detected a new COVID variant that experts say is already evident in wastewater samples in California, even as access to vaccines is restricted.