See our updated MMR infographic and check out the findings of a Pew Research study that examined the safety of tattoo ink and permanent makeup.

See a summary of our understanding of long COVID based on an extensive review of the scientific literature.

Watch our new videos about H5N1, COVID-19 boosters, and the SARS-CoV-2 lab leak theory. Also, check out our new pneumococcal infographic, updated Q&As, and free newsletters.

The short answer to this question is no, but in some cases, certain racial or ethnic groups are mentioned in vaccine recommendations. Watch the video to see why.

The difficulty of selecting a vaccine strain of virus was on display during the planning for 2024-2025 COVID-19 vaccines. Find out what happened and what it means for this year's updated versions.

Learn about the first RRP Awareness Day, how climate change can affect our risk for infectious diseases, and which vaccine has saved the most infant lives during the last 50 years.

Dr. Lori Handy describes the symptoms of dengue and why people are at increased risk for severe disease during a second dengue infection.

Respiratory infections stealthily move around communities, leaving many families incomplete. Find out how many people succumbed to COVID-19 and influenza — per hour — during the fall and spring of 2023-2024.

Learn about two studies that evaluated COVID-19 vaccine safety. Watch “Pennsylvania: At the forefront in the prevention of infectious diseases” to learn about the major milestones and discoveries that happened in PA.

Watch as Dr. Handy describes the effectiveness of the measles vaccine and which three groups might need a booster during outbreaks.