1. Data portal. Centers for Disease Control and Prevention website. https://www.cdc.gov/hai/data/portal/index.html. Updated November 20, 2021. Accessed April 22, 2021.
2. About NHSN. Centers for Disease Control and Prevention website. https://www.cdc.gov/nhsn/about-nhsn/index.html. Updated January 25, 2021. Accessed April 22, 2021.
3. About HICPAC. Centers for Disease Control and Prevention website. https://www.cdc.gov/hicpac/about.html. Updated November 5, 2015. Accessed April 22, 2021.
4. Transmission-based precautions. Centers for Disease Control and Prevention website. https://www.cdc.gov/infectioncontrol/basics/transmission-based-precautions.html. Updated January 7, 2016. Accessed April 22, 2021.
5. Segal P. The evolution of isolation precautions. Infection Control Today website. https://www.infectioncontroltoday.com/view/evolution-isolation-precautions. Published March 19, 2018. Accessed April 22, 2021.