Diminishing demand may close the Brazos Co. Vaccination Hub's first-dose operation down earlier than scheduled Hannah King and last updated 2021-04-25 19:22:24-04 BRYAN, TEXAS â What was once a supply issue, has quickly turned into a demand issue and that's the problem many vaccination leaders are seeing with COVID-19 vaccination efforts, especially in Brazos County. The demand for vaccinations in Brazos County are continuing to decline and have been over the last several weeks. Last week, there weren't enough arms coming through the hub to meet doses allocated for. "I think we were right over 800 doses.... Last Tuesday, we opened it to up walk ins and we only had 78 walk-ins. The week before that we had a little over 200 walk ins," Chief Stewart, the COVID-19 Vaccination Task Force Leader in Brazos County said.