Glossary

Learn more about the terminology used in the Ending the HIV Epidemic: A Plan for America initiative.

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Click on a term to view its definition.

Provisional Data

Provisional data are data that have at least 12 months of reporting delay and applies only to annual data. For example, 2018 annual data using a December 2019 dataset are provisional.

Studies have shown that PrEP reduces the risk of getting HIV from sex by about 99% when taken daily. Among people who inject drugs, PrEP reduces the risk of getting HIV by at least 74% when taken daily.