Long lines formed Jan. 11 in Fair Park, where Dallas County opened its first "mega" vaccination site. Credit: Shelby Tauber for The Texas Tribune Need to stay updated on coronavirus news in Texas? Our evening roundup will help you stay on top of the day's latest updates. Sign up here. The mythic idea of "herd immunity" from COVID-19 in the long journey back to normal may be out of reach for Texas any time soon, state health officials and medical experts say. But while it remains the ultimate goal, they say it isn’t necessary to begin stemming some of the pandemic’s devastating effects in the state.