San Antonio – Medevac crews are staying busy transferring COVID-19 patients from rural hospitals to San Antonio-area hospitals. AirLIFE crews reports 72 transfers of known or suspected COVID-19 patients since March to San Antonio, Kerrville, Pleasanton and Uvalde bases. “I’d say probably about a third of our calls now are COVID-19 patients,” Ramirez said. “We typically see the sickest of the patients,” Ramirez said. None of the flight crews directly working with positive COVID-19 patients have contracted the virus.