Summer spike: Bexar County's coronavirus positivity rate, case numbers soar again 17% of all COVID-19 tests in the San Antonio area returned a positive result last week, while the county averaged 589 new cases per day. Author: KENS 5 Staff (KENS 5) Published: 7:38 PM CDT July 27, 2021 Updated: 7:42 PM CDT July 27, 2021 SAN ANTONIO — Call it a summer spike: COVID-19 numbers continue to climb in the San Antonio area, which is seeing substantial community transmission as the Delta variant runs rampant. San Antonio Metro Health moved the city's COVID-19 Risk Level into the moderate and worsening zone, citing a critical rise in the 2-week decline in cases and positivity rate and intensified hospital trends.