Express Briefing: Why vaccine distribution is so difficult Jan. 21, 2021 FacebookTwitterEmail Jay Flexner, 59, gets the Moderna COVID-19 vaccine administered by Maribel Hernandez at Wonderland of Americas Mall, Monday, Jan. 4, 2021. People lined up for the vaccine administered by University Health. It is the first day of vaccinating people in the 1B group, those 65 years and over and 18 and above with certain medical conditions. The 17,280 vaccination slots were taken up in five hours after University Health opened the website for registration on Dec. 31.Jerry Lara, Staff / San Antonio Express-News Good morning. This is a look at our daily Express Briefing newsletter. Sign up for Express Briefing here. Subscribers get access to the full version of our Express Briefing newsletter, which includes exclusive insight and links to more of our best stories. To become a subscriber, take advantage of this special offer today.