Six major medical groups, and a pregnant physician, are suing HHS Secretary Robert F. Kennedy Jr. over changes he made to Covid-19 vaccine recommendations.

Doctors groups and public health organizations are suing the U.S. government over the decision to stop recommending COVID-19 vaccinations for most children and pregnant women.

The American Academy of Pediatrics, the American Public Health Association and several other groups filed a lawsuit Monday in federal court in Boston over the Trump administration’s new policy on COVID-19 vaccinations.