A series of recent changes could have significant implications for how Americans receive and pay for their shots.

A lawyer who represents Children's Health Defense—the rabid anti-vaccine organization founded by the equally fervent anti-vaccine advocate and current US health Secretary, Robert F. Kennedy Jr.—has filed a lawsuit against Kennedy, alleging that he has failed to set up a task force to promote safer childhood vaccinations.

The Centers for Disease Control and Prevention Advisory Committee on Immunization Practices voted 5-1-1 in favor of ensuring that all children under 18, pregnant women, and adults receive only single-dose, mercury-free flu vaccines, according to HHS.