Texas sets up call center to connect businesses, organizations with mobile vaccination teams Tags: HOUSTON – Texas is launching a call center to increase COVID-19 vaccinations statewide, according to a press release. Businesses and civic organizations can schedule to have a mobile vaccination team vaccinate employees, visitors or members. To qualify, the business or organization must have 10 or more employees who voluntarily choose to be vaccinated. Interested parties can call 844-90-TEXAS and select Option 3 to schedule a visit. Homebound Texans are also encouraged to call the hotline and select Option 1 to request a state mobile vaccination team to visit their home.