Phase 1C will start March 15, allowing Texans 50 and above to get vaccinated The Texas Department of State Health Services cited that 93% of deaths in the state are in people ages 50 and above. Author: Eline de Bruijn Updated: 6:43 PM CST March 11, 2021 DALLAS — Updated March 11 with information from the state. Phase 1C will expand vaccine eligibility to Texans who are 50 and above beginning on March 15, the state health department said Wednesday. The Texas Department of State Health Services cited that 93% of deaths in the state are in people ages 50 and above. Phase 1A and 1B are currently underway. Last week, President Joe Biden and the federal government expanded eligibility to educators and workers at schools and child care facilities.