Brazos vaccination hub requesting fewer first doses this week due to diminishing demand and last updated 2021-04-18 19:05:17-04 BRYAN, TEXAS â Normally, the Brazos County vaccination hub requests 5,000 first doses from the state each week, but not this time. Chief Jim Stewart says they only asked for 2,000, which is the lowest number of first-doses they ever requested. Residents crashed the Brazos County vaccination hub's appointment website on numerous occasions early on, but that's not the problem the hub is having now. Leaders are seeing a diminishing demand across the board, particularly with the number of people wanting their first dose of the COVID-19 vaccine.