(Irene Yi/UC Berkeley via AP)ANN ARBOR – The University of Michigan has announced that all graduate and professional students who live on or frequent campus will have to undergo mandatory weekly COVID-19 testing. Undergraduate students on campus already undergo required weekly testing for the virus. According to the letter, testing through Michigan Athletics, University Health Service or Occupational Health Services meets the weekly requirement. According to U-M, weekly COVID-19 testing through the school is required for all students who live on or visit campus, including those who are:Living in Michigan Housing. Starting on Monday, all graduate and professional students will see a weekly testing status box appear in their ResponsiBLUE app.