Dr. Joseph Varon, 58, the chief medical officer at United Memorial Medical Center, hugs Christina Mathers, 43, a nurse from his team who became infected with COVID-19, at United Memorial Medical Center (UMMC), during the coronavirus disease (COVID-19) outbreak, in Houston, Texas, U.S., July 25, 2020. Mathers was told she tested positive for COVID-19 after she reported feeling ill during one of her shifts. "That's the hardest thing to ever hear... It messes with you," said Mathers, who has been working every other day since April 29. "But I wouldn't go anywhere else but here." REUTERS/Callaghan O'Hare TPX IMAGES OF THE DAY SEARCH "COVID-19 HOUSTON VARON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY