Data for the years 2021 & 2022 are preliminary. Due to the impact of the COVID-19 pandemic, data for the year 2020 should be interpreted with caution. Visit coronavirus.gov for the latest Coronavirus Disease (COVID-19) updates.
COVID-19 disruptions in HIV, diagnosis, care and reporting of deaths during 2020 have also made incidence, prevalence, and knowledge of status estimates derived from a CD4-based model, unreliable. Therefore, the HIV surveillance supplemental report Estimated HIV Incidence and Prevalence in the U.S., which provides data on estimated incidence, prevalence, and knowledge of status in the U.S., was not published by CDC this year.

Cumulative Quarterly Data | AHEAD

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.

Cumulative Quarterly Data

Data presented cumulatively by quarter are always preliminary and are presented for a data year. For example, Q2 2020 data includes Q1 2020 and Q2 2020. Cumulative quarterly data allow the user to compare current results to a target to determine where a jurisdiction is and how much farther the jurisdiction needs to go. Additionally, cumulative quarterly data provide the most accurate data available which would include any updating that occurs as data are reported.