Facts & FAQs

Vaccine facts, backed by evidence

Explore surprising facts about vaccines and public health, then find honest answers to the questions we hear most.

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Vaccine Fun Facts

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Vaccines can Prevent Certain Types of Cancers

Some cancers are caused by viruses! The HPV vaccine helps prevent infections that can lead to cervical, throat, anal, and other cancers, while the hepatitis B vaccine helps prevent liver cancer. Vaccines aren't just about preventing infections—they can also protect people from developing cancer decades later.

Immunizations Currently Prevent Millions of Deaths Each Year

According to the World Health Organization (WHO), immunizations prevent approximately 3.5–5 million deaths each year from diseases such as measles, tetanus, influenza, and whooping cough. That's millions of people who get to live longer, healthier lives because of vaccines.

Common Concerns

Frequently asked questions

Honest answers to the questions we hear most often about vaccine safety, effectiveness, and access.

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