HOUSTON, Texas (KTRK) -- Texas is expanding its vaccine availability to those 50 years and older, the age group that has made up 93% of COVID-19 deaths in Texas, in the state's 1C phase. Texas' 1C phase is different from the Centers for Disease Control and Prevention's definition of the 1C Category. The state announced it will base the phases on ages, not occupation, which means some essential workers will not be included in this next rollout phase. The 1C group includes about 5 million people. About 1 million from that age group have already received the vaccine, according to the Texas Department of State Health Services. With groups 1A, 1B and 1C open, between 12 million to 14 million Texans will be eligible to get the vaccine.