Several major medical organizations filed a lawsuit against the HHS and Secretary Robert F. Kennedy Jr. on Monday over what they are calling “unlawful" vaccine changes.

Several major medical organizations filed a lawsuit against the HHS and Secretary Robert F. Kennedy Jr. on Monday over what they are calling “unlawful" vaccine changes.

HHS Secretary RFK Jr. said he wants to encourage all Americans to use wearables to track health metrics. What are the benefits and drawbacks?

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

HHS Secretary Robert F. Kennedy Jr. and the CDC vaccine panel have been casting doubt on the hepatitis B shot and the practice of vaccinating newborns.

ABC News’ Jonathan Karl interviews former CDC official Dr. Fiona Havers on “This Week.”

On “This Week,” ABC News’ Senior White House Correspondent Selina Wang reports on the latest from the CDC’s vaccine advisory committee.

ABC News' Dr. Tara Narula breaks down what the latest CDC vaccine advisory panel discussions could mean for your family, including possible changes to childhood vaccinations.

The CDC's new vaccine advisory panel, appointed by HHS Secretary Robert F. Kennedy Jr., is set to meet again to make some recommendations on vaccines for the flu and the winter virus season.

The CDC's vaccine advisory committee is set to meet for the first time since HHS Secretary Robert F. Kennedy Jr. dismissed the entire panel and appointed new members.

Health Secretary Robert F. Kennedy Jr. is set to meet with the CDC’s new vaccine panel, made up with members he picked.

Secretary Kennedy has long held many vaccine-skeptic views.

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. announced on Wednesday eight new members of the CDC's independent vaccine advisory committee, some of whom have been critics of shots.

The announcement came after Health and Human Services Secretary Robert F. Kennedy Jr. removed all 17 sitting members of the CDC’s independent vaccine advisory committee on Monday.

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).

CDC workers protested outside the agency's headquarters after Health Sec. Robert F. Kennedy Jr. dismissed all 17 members of the CDC's independent advisory board for vaccines.

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. Noel Brewer is a former voting member of CDC's Advisory Committee on Immunization Practices and talks about his firing Monday after an announcement by HHS Secretary Robert F. Kennedy Jr.

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.

The Health and Human Services secretary said replacing all 17 members of the CDC's vaccine advisory committee "is necessary to reestablish public confidence in vaccine science." 

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.

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.

Experts say Robert F. Kennedy Jr. has talked about "freedom of choice" in health care while limiting choices on some products for many Americans.

Robert F. Kennedy Jr. plans to tell medical schools they must offer nutrition courses to students or risk losing federal funding from the DHS.

Certain studies within the Trump administration's "Make America Healthy Again" report do not exist as cited, ABC News has confirmed.

Certain studies within the Trump administration's "Make America Healthy Again" report do not exist as cited, ABC News has confirmed.

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.

ABC News’ Linsey Davis spoke with Dr. Deborah Birx about RFK Jr.’s changes to the CDC's immunization schedule that no longer recommends COVID shots for healthy children and pregnant women.

HHS Secretary Robert F. Kennedy Jr. has announced the department will no longer recommend the COVID-19 vaccine for healthy children and pregnant women.

ABC News' Dr. Darien Sutton discusses the move which could alter guidance for doctors as well as some insurance coverage.

Food and Drug Administration Commissioner Marty Makary says the White House's Make America Healthy Again Commission’s report on chronic illnesses in children takes an “objective, scientific approach.”

ABC News’ Mary Bruce reports on the details of the report from the White House's Make America Healthy Again Commission.

RFK Jr.'s MAHA report blames chronic illnesses on ultra-processed foods, chemicals and sedentary behavior among children. It also says childhood vaccines need more study.

Health and Human Services Secretary Robert F. Kennedy Jr. answered questions before a House committee on Wednesday, saying, "I don't think people should be taking medical advice from me."

HHS Secretary Robert F. Kennedy Jr. is set to testify before two congressional committees on Wednesday.

During a congressional hearing, HHS Secretary Robert F. Kennedy Jr. said people shouldn't be taking medical advice from him, and was grilled by both parties on topics including vaccines and DOGE cuts.

Health and Human Services Secretary Robert F. Kennedy Jr. defended the massive cuts to the department's workforce and laid out his priorities for the Trump administration's proposed budget.

RFK Jr. shared photos of himself swimming in Washington, D.C.'s, Rock Creek.

Health and Human Services Secretary Robert F. Kennedy Jr. shared photos of himself and his family at Washington, D.C.'s Rock Creek on Sunday.

Earlier this week, Trump announced his pick for U.S. surgeon general, Dr. Casey Means. Here's what we know about her background and where she stands on health issues.

The FDA approved two natural food dyes and expanded approval of a third on Friday in line with HHS’ goal to eliminate artificial food dyes.

Senators sent a letter to Health and Human Services Secretary Robert F. Kennedy Jr. warning him that cuts to the agency could severely impact the Indian Health Service.

A Department of Health and Human Services spokesperson called the move "a radical departure from past practices."

Doctors and public health specialists say they view the administration's actions, such as firings or questioning established research, as an "attack" on science.

ABC News’ Juju Chang speaks with Food and Drug Administration Commissioner Marty Makary on the FDA’s plan to remove artificial dyes from food and mass layoffs under Robert F. Kennedy Jr.

Health and Human Services Secretary Robert. F. Kennedy Jr. unveiled a plan on Tuesday to start phasing out eight synthetic food dyes. Are they unsafe? Experts weigh in.

ABC News Medical Contributor Dr. Alok Patel reacts to comments by Health Secretary Robert F. Kennedy Jr. calling sugar 'poison.'

The eight petroleum-based dyes are found in thousands of products from candy to cereal to medication.