Doses of the COVID-19 vaccine were already in short supply and now even more people are eligible to get inoculated. Available slots fill up soon after they're announced, but logistical hurdles have impeded efforts and caused confusion in communities across Texas. Texas had only administered about 35% of its 1.3 million available doses as of Jan. 7. About 200,000 more doses are expected to arrive in state this week, with most headed for large “vaccination hubs” including the Alamodome in San Antonio.