A Guide to the COVID-19 Vaccine in North Texas Answering your questions about registration, vaccination locations, vaccine efficacy, and more. The latest: all Texans 50+ will be eligible starting March 15. By Will Maddox Published in Healthcare Business March 15, 2021 3:00 pm This will be updated as the situation evolves. Last updated 3/15, at 3 p.m. Dallas County has administered more than 670,000 COVID-19 vaccines through March 15. About 450,000 people have received first doses while 240,000 are fully vaccinated. Texas has administered more than 8 million doses. Its population share—9 percent of all Texans are fully vaccinated—is 47th in the country. One in five Texans are still hesitant to receive the vaccine. To combat vaccine hesitancy, the state has launched a $2.3 million campaign to encourage Texans to get vaccinated.