Vaccines - Research and Data from KFF

KFF Tracking Poll on Health Information and Trust: Update on Common Vaccine Myths

Jun 30, 2026

Poll Finding

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."

HHS Public Health Policy Actions Under the Trump Administration 2025-2026

Jun 30, 2026

Tracker

A comprehensive timeline of public health policy actions by the Department of Health and Human Services (HHS) under the Trump administration from 2025-2026, with key dates, descriptions, and impacts.

“Breakthrough” COVID-19 Hospitalizations Among Fully Vaccinated Patients Occur Most Often among Older Adults and Involve People with Chronic Health Conditions

Dec 15, 2021

News Release

“Breakthrough” hospitalizations involving COVID-19 among people who are fully vaccinated against the disease most often affected older adults and people with other chronic health conditions, finds a new analysis of hospital data from June through September by KFF and Epic Research. More than two-thirds (69%) of breakthrough COVID-19 hospitalizations occurred among people ages 65 and older, who are more likely than younger age groups to have gotten vaccinated. A fifth (21%) of breakthrough hospitalizations occurred…

Where Americans Saw Information About Tax and Budget Legislation on Social Media, and False Measles Narratives Target Immigrants — The Monitor

Jul 24, 2025

Feature

This volume shares findings from KFF’s latest poll on how the public encountered information about the recently passed tax and budget legislation; misleading narratives blaming undocumented immigrants for the current measles outbreak; misrepresentations of vaccine safety systems; claims that climate change isn’t real following deadly Texas flooding; and confusion around statins for preventing heart disease.

Better Prompting May Help Reduce AI Hallucinations, False Vaccine Claims Spread, and Industrial Solvent Promoted as Hidden Cancer Cure — The Monitor

Aug 28, 2025

Feature

This volume examines how prompting techniques can reduce incorrect medical information from AI chatbots; false claims linking vaccines to sudden infant death syndrome; the promotion of an industrial solvent as an allegedly suppressed cancer cure; misunderstandings about the risks of overdose from fentanyl exposure; and ongoing myths about sunscreen safety.

A Look at Recent Changes to State Vaccine Requirements for School Children

Sep 12, 2025

Policy Watch

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.

Do We Want to Outsource U.S. Vaccine Policy to Denmark?

Dec 19, 2025

Quick Insights

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.

Addressing Misinformation Among Black Adults: Snapshot from the KFF Health Misinformation Tracking Poll Pilot

Sep 15, 2023

Poll Finding

This report examines the exposure to, and belief in, health misinformation among Black adults, as well as the media sources they use and the trust they place in health information received from various outlets. It is a companion to the KFF Health Misinformation Tracking Poll Pilot.

COVID-19 Vaccination Rates Among Nursing Home Staff Have Risen by 25 Percentage Points Since the Biden Administration Announced a Vaccination Mandate for Health Care Workers Last Year

May 16, 2022

News Release

In a new analysis, KFF researchers find that COVID-19 vaccination rates among nursing home staff increased by 25 percentage points nationally (63% to 88%) from when the Biden administration announced the vaccine mandate for health care workers in August 2021 to after vaccination deadlines passed in March 2022. Researchers analyzed nursing home-level data from the federal government covering some 14,700 nursing homes, or about 97 percent of all nursing homes in the U.S. They conclude…

Monkeypox Vaccine Roll-out in the U.S. – Are Jurisdictions Requesting All Their Doses?

Jul 29, 2022

Policy Watch

This analysis examines monkeypox vaccine allocations and jurisdictional requests. It explores jurisdictional request rate (the number of vaccine does requested as a share of the jurisdiction’s allocation from HHS) for JYNNEOS, the preferred vaccine. Overall, while most jurisdictions have requested at least their full supply, some are well below that mark, raising questions about how quickly their at-risk populations can get protected.

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