Starting Monday, a new group of Texans becomes eligible for the COVID-19 vaccine, as anyone over the age of 50 will be able to get a shot.
According to President Joe Biden, the vaccine will be made open to all adults by May 1.
The state said about 5 million Texans are in the new 1C group.
Some county leaders want the state to make all adults eligible for vaccine before May 1.
There have been four months of COVID-10 vaccinations administered in Texas.
More than half of seniors across the state have received at least one shot.
Teachers became eligible earlier this month, and starting Monday, anyone 50 years or older can get a shot.
Tarrant County Judge Glen Whitley said registration has spiked since the 1C group was announced. Whitley said, "I think we've had about 100,000 more in the last few days."
President Biden wants all adults to be eligible by May 1, but states can start earlier than that.
"I wish they would open it up and let everyone get in line and we can make appointments," Whitley said.
The increase in vaccinations comes at a time when businesses in Texas are open at 100%, and in some places, masks are not required, coinciding with the start of St. Patrick’s Day weekend and spring break.