1 in 10 of Texas’ undocumented population lives in the Rio Grande Valley region where they don’t have health insurance, and the ability to get care is limited, says Dr. Sujan Gogu, a family medicine physician serving who lives in the community on the U.S.-Mexico border. When patients seek medical attention it's often in the latter stages of illness, when the virus is really affecting them. "The consequences are much more severe at that point,” Gogu says.