Students will be required to get tested for COVID-19 twice a week as part of new “testing cohorts,” the college announced in an email Monday evening. 

The testing cohorts will allow students to pick a set two-day period each week to get tested at Tufts Medical Center, Assistant Vice President for Campus Life and “COVID Lead” Erik Muurisepp said in the email. Students can choose to test on Mondays and Wednesdays, Tuesdays and Thursdays, Wednesdays and Fridays, or Fridays and Mondays, with limited spaces available in each grouping. 

Muurisepp’s announcement contradicts the college’s previous November announcement of an every-four-day testing requirement for the spring semester. 

The announcement comes a week after the college disclosed that it would be delaying its initial move in and in-person class start date. The college also stated that it would be implementing a mandatory quarantine until Jan. 29 for all students upon their arrival to campus as case numbers in Boston and the state continue to surge. 

Students must select a testing cohort by the end of the day on Jan. 11 via an online form. The selection process will open to students later this week.