AUSTIN, Texas (AP) — Houston is opening up testing for COVID-19 even to residents without any apparent symptoms. Mayor Sylvester Turner said Monday that the city’s two testing sites will soon be able to process 500 tests per day. Houston had at least 2,239 cases and 18 deaths so far. Turner is also urging caution amid talk of getting the country back to work. Gov. Greg Abbott says Texas businesses won’t all reopen at once but has yet to set any timetable.