Brazos Valley vaccination hub set to administer 10,000 vaccines this week Vaccination Hub will administer 5,000 first doses and 5,000 second doses and last updated 2021-03-02 18:44:04-05 BRYAN, TX â The Brazos Valley Vaccination Hub is a month into vaccinating at the Brazos Center. This week, the hub is set to administer 10,000 vaccine doses, marking the most doses administered thus far. Those shots are split evenly in half between the first doses, and the second ones. âSo, Monday through Wednesday morning, we will be administering 5,000 first doses and then we will take a breather Wednesday, at the lunch hour, but then Wednesday afternoon we will pick up with the second doses and we will do them Wednesday afternoon, Thursday and Friday,â said Chief Jim Stewart.