The 17 members of the CDC's vaccine advisory committee, who were ousted last week, argued their abrupt dismissal has "left the U.S. vaccine program critically weakened."

Robert F. Kennedy Jr. recently removed all 17 sitting members of the CDC’s vaccine advisory committee. Who could be on the committee next and what changes may be coming?

Current and former CDC employees were protesting HHS Sec. Robert F. Kennedy Jr.’s decision to fire all 17 experts from the Advisory Committee for Immunization Practices (ACIP).

HHS Secretary Robert F. Kennedy Jr. announced on Monday he is removing all 17 members of the Centers for Disease Control and Prevention’s vaccine advisory committee.

Dr. Richard Besser, CEO of the Robert Wood Johnson Foundation, says Health and Human Services Secretary Robert F. Kennedy Jr.’s action decreases the ability of doctors to inform their patients.

Dr. Amesh Adalja, a senior scholar at Johns Hopkins University, says Health and Human Services Secretary Robert F. Kennedy Jr.’s action makes the U.S. “less prepared for infectious disease threats.”

Most U.S. counties have seen a decline in measles, mumps and rubella (MMR) vaccination rates over the last five years, according to a new report published Monday.

Public health experts said healthy children also at risk of severe disease and death from COVID amid RFK Jr.'s announcement of new CDC COVID vaccine recommendations.

Texas lawmakers have passed a bill that would make it easier for parents to opt out of vaccinating their children, despite the current measles outbreak in West Texas.

Infectious disease experts say mRNA vaccines have been studied for decades, they are safe and effective, and were instrumental in saving lives during the COVID pandemic.

The Department of Health and Human Services under Robert F. Kennedy Jr. plans to require placebo-controlled trials for new vaccines before they are licensed for public use.

News’ Stephanie Ramos spoke with ABC News’ medical contributor Dr. Alok Patel about the growing number of measles cases, vaccines and President Trump’s physical exam.

Dr. Gayatri Devi, director of Park Avenue Neurology, discusses the new study published in the journal Nature that found a connection between the shingles vaccine and dementia.

The Centers for Disease Control and Prevention (CDC) will study whether vaccines cause autism, despite numerous existing studies already showing there is no link.

Republicans have proposed legislation in several states to ban the pioneering technology used in COVID shots.

A personalized mRNA vaccine appeared to reduce the chances of pancreatic cancer returning after surgery, according to a study published in the journal Nature.

Board certified psychiatrist Dr. Sasha Hamdani reacts to the comments Health Secretary Robert F. Kennedy Jr. made to a room packed with federal health workers on Tuesday.

Louisiana’s surgeon general announced late Thursday that the state health department "will no longer promote mass vaccination." Here's what that could mean.

There are currently no recommendations for anyone to be vaccinated against bird flu and federal health officials note this is being done out of "an abundance of caution."

New CDC data published Wednesday found vaccination coverage among kindergartners fell slightly from the year before as exemptions reached record highs.

As kids head back to school ,the flu season is not far off. ABC News’ medical correspondent Dr. Darien Sutton is here with some advice on the right time to take the flu and COVID shots.

A new report on Sunday from the WHO and UNICEF found that global vaccine coverage for DTP and measles has increased but is not yet back to pre-pandemics levels.

The varicella outbreak was first identified in October 2022 in persons who’d migrated through or from Central and South America.

Nurse Sandra Miceli, from Webster, New York, was fined $55,000 after allegedly falsifying vaccine records for more than 100 children.

The report found that 82.1% of children who contracted MIS-C were unvaccinated.

The seventh case of measles linked to an outbreak at Manatee Bay Elementary School in Florida was confirmed by officials on Tuesday.

National MMR coverage has dropped 2% from the 2019-2021 school year to the 2022-2023 school year,

A doctors' group is offering free measles vaccines for unvaccinated residents in Philadelphia to fight an outbreak that has infected eight people so far.

The national vaccination rate for kindergarten-aged children dropped from 95% in 2019-2020 to 93% in the 2022-23 school year.

What factors led up to the fumbled rollout of the brand-new RSV shot for babies that has pediatricians worried and frustrated.

A recent CDC report found Idaho is lagging behind the rest of the U.S. when it comes to routine childhood vaccinations. Experts reveal why that may be the case.

Domestic measles cases surged in 2019, with an estimated 1,274 people sick in at least 31 states -- the greatest number of cases reported since 1992, the CDC says.

A new CDC report published Thursday found 93% of kindergartners met school requirements for childhood vaccinations, lower than the 95% seen pre-pandemic.

ABC News medical correspondent Dr. Darien Sutton shares what you should know about getting your COVID-19, flu and RSV vaccines.

ABC News chief medical correspondent Dr. Jen Ashton explains a new study that found one in every six toddlers initiated but did not complete a multi-dose vaccine series.

The CDC issued a Health Alert this week, warning Americans about rising measles cases linked to international travel.

The most important thing is to get vaccinated no matter the circumstances, doctors say.

Pfizer announced Thursday that its vaccine candidate for respiratory syncytial virus was 85.7% effective in preventing lower respiratory tract illness in older adults.

Public health experts tell ABC News which vaccine is used to protect against polio and why most Americans are unlikely to be infected with the disease.

Children in London are being offered polio vaccine boosters after sewage samples with the virus were found in multiple areas across the city.

New York health officials said a patient was infected with vaccine-derived polio. Here's what that means.

The vaccine will mainly be available to healthcare workers and lab personnel.

An independent CDC advisory panel will vote Tuesday on whether to recommend Pfizer's COVID-19 vaccine for children ages 5 to 11 in the U.S.

The vaccination rate nationwide is down to the lowest level since January.

The CDC found a more than 80% decline in HPV infections nationally.

The Pfizer and Moderna vaccines are safe and effective in pregnant and lactating women and those women are able to pass protective antibodies to their newborns.

Clinical studies showed that the one-shot vaccine provides strong protection against COVID-19, including 85% effectiveness against severe illness and preventing 100% of hospitalizations and death.

The British government will begin a new trial to test mixing different types of COVID-19 vaccines, in which participants will receive one dose followed by a second booster shot of a different vaccine.

One-third of parents are delaying immunization

An Illinois pediatrician who died by suicide last year may have forged patient's vaccination medical records, according to investigators.