The acting head of FEMA told lawmakers on Tuesday that less than 6% of COVID-19 tests for migrants at the U.S.-Mexico border have come back positive, a lower percentage than the overall positivity rate in the state of Texas. … However, the rate of infection among migrants tested at the border is lower than that of the state overall. As of Tuesday, the seven-day average of the state's positivity rate stood at 7.4%, according to Johns Hopkins University.