Though access to immunization around the world has improved, there is still work to be done.

There is a lot to consider when deciding whether to participate in a clinical trial. Any clinical trial includes risks, which the study doctor will review with you. Make sure you understand the risks before participating.

Resources for patients

For help understanding clinical trial listings and for other resources, visit our Patient Resources section.
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About clinical trials

Learn what clinical trials are, how they work, and if you may be eligible to participate.
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