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Historical COVID-19 Data

The graphs and tables below show weekly trends in University-wide tests and new positive cases from June 1, 2020 to July 2022. Weekly test results ceased being reported after the University ended required surveillance testing in May 2022.

The data below remains available to the public for academic and learning purposes. When reviewing the data, it is important to note that:

  • In academic year 2020-21, only a limited number of students, faculty, staff, and other affiliates were authorized to be on campus and to participate in Harvard’s COVID-19 testing program; the majority of Harvard’s community members worked and learned remotely during that time.
  • In academic year 2021-22, the University welcomed many more community members back to campus to resume in-person academic and work activities, and to participate in Harvard’s COVID-19 testing program.1
  • Beginning in May 2022, Harvard shifted to optional screening for all on-campus affiliates who elect to be tested, or are showing symptoms of COVID-19. In conjunction with student residential populations leaving campus for summer recess, it is anticipated that a majority of affiliates will opt for non-scheduled testing.
  • The data reflects results of the University’s COVID-19 testing program; it is not combined with other testing sources or providers, and is not inclusive of positive cases recorded outside of the program that may have been reported to the University.

Total Tests Conducted by Week

Total New Positive Cases by Week

Footnotes:

  1. Individuals authorized to participate in Harvard’s COVID-19 screening include students, faculty, staff, and other affiliates authorized to be on campus as well as any primarily remote affiliates who HUHS advises to come on campus to test.
  2. “Total tests” is cumulative and includes repeat tests that are required of students, faculty, staff, and other affiliates.
  3. “Graduate Students” and “Undergraduate Students” includes students who are eligible to participate in Harvard’s testing program; this includes students living in on-campus housing, those working in labs, and those authorized to be on campus for an academic or work purpose.
  4. “Faculty, Staff, and Other Affiliates” includes faculty, academic and non-academic staff, and others (such as contractors) who are eligible to participate in Harvard’s testing program; this includes faculty or staff working on campus, living on campus, or otherwise authorized to be on campus.

Notes:

  • Data are presented according to the date tests are administered. Counts for most recent dates may be incomplete, but will be updated as results are reported.
  • The tables and graphs are informational only and are not intended to be used as public health guidance.