The independent source for health policy research, polling, and news.
KFF’s policy research provides facts and analysis on a wide range of policy issues and public programs.
KFF designs, conducts and analyzes original public opinion and survey research on Americans’ attitudes, knowledge, and experiences with the health care system to help amplify the public’s voice in major national debates.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the organization’s core operating programs.
With recent federal actions to curtail vaccine access, many states have announced actions intended to maintain broader access. This issue brief provides a snapshot of this rapidly changing landscape, tracking which states have instituted changes in response to or in anticipation of administration policy changes.
This volume explores findings from the KFF-Washington Post Survey of Parents on views of childhood vaccines; how ACIP may have contributed to concerns about hepatitis B and COVID-19 vaccines; recent HHS warnings about alleged links between Tylenol use in pregnancy and autism; and AI-generated deepfakes impersonating doctors to sell products.
This volume examines findings about trusted sources of vaccine information from the latest KFF Tracking Poll on Health Information and Trust. It also explores how the misrepresentation of studies and policy developments contribute to health narratives around vaccines, HIV and PrEP. Lastly, it summarizes new research on the use of generative AI to counteract vaccine misinformation.
This brief summarizes the history, rationale, and policy issues related to the federal government's key vaccine injury compensation programs, known as the Vaccine Injury Compensation Program (VICP) and Countermeasures Injury Compensation Program (CICP).
This brief summarizes the "test-negative" methodology for estimating the effectiveness of influenza and COVID-19 vaccines, noting its strengths and potential limitations. This is the design is used in a CDC-led COVID-19 vaccine study that HHS decided not to publish.
This policy watch examines state-by-state school vaccine requirements and exemptions, including recent policy changes to them and the extent to which they may affect vaccination rates.
Starting in May of last year, HHS Secretary Kennedy and the CDC/ACIP began to make changes to the federal vaccine schedule for children, culminating in an announcement on January 5 of this year with the most wide-ranging changes to date. This policy brief tracks the number of states that have announced they are no longer following federal government recommendations for childhood vaccines as of January 20, 2026.
This brief looks at newly announced changes by HHS to the pediatric vaccination schedule, which reduce the number of vaccines recommended for all children. Implications of these changes for childhood vaccination rates and trust in public health are discussed.
This poll looks at exposure to and belief in several vaccine myths and finds that people without a trusted health care provider, and those who regularly use social media or AI for health information, are generally more likely than others to belief the false claims. It also analyzes belief across vaccine myths, showing the share of the public that are consistent myth believers, consistent myth deniers, and those who land in the "mixed middle."
Adopting Denmark’s vaccine schedule, as HHS Secretary Kennedy's vaccine advisors have suggested, would likely lower childhood vaccination rates in the U.S. as certain vaccines become harder to access.
© 2026 KFF