The suggested citation information on the Health People site (but not APA format) is:
Healthy People 2020 [Internet]. Washington, DC: U.S. Department of Health and Human Services, Office of Disease Prevention and Health Promotion [cited [Date URL was accessed]]. Available from: [Specific URL].
Therefore, if I were to use this https://www.healthypeople.gov/2020/topics-objectives/topic/immunization-and-infectious-diseases it would look like this in APA style 7th edition:
U.S. Department of Health and Human Services (n.d.). Immunization and Infectious Diseases. January 28, 2020. https://www.healthypeople.gov/2020/topics-objectives/topic/immunization-and-infectious-diseases
At times you may wonder who to cite as the author when looking at a government or organization webpage. Most government sites will provide guidance on that. We have provided a few links for some below. Be aware that the style these examples are in may not be, and most likely isn't, APA style. Use this information for the citation components needed and format it in the style you have been asked to.
HHS.gov, SurgeonGeneral.gov, HealthCare.gov or Flu.gov Web pages
You may cite content from an HHS website by using the date, page title, and the URL.