The University of Texas confirmed on Thursday that 13 football student-athletes have tested positive or are “presumed positive” for Covid-19.

The statement released by the university added all 13 players are now self-isolating. Ten other football players will self-isolate due to contact tracing, “all of whom are asymptomatic at this time.”

The 13 confirmed cases also include two positive cases which were reported in initial surveillance testing done by the university last week.

The university also said four other football student-athletes have tested positive for the Covid-19 antibody.

Some context: Big 12 conference football players were able to return to campuses for voluntary workouts on Monday. Kansas State reported eight student-athletes tested positive for coronavirus on Wednesday.

Sources CNN