Vernon, who has diabetes and was recently widowed, has lived the last year in isolation. Vernon and her daughter Cathy waited five hours in a traffic jam outside the convention center only to be told the city ran out of vaccines. A loophole that allows people to register off other people’s COVID-19 vaccine appointment link led to long lines and frustration outside Dallas’ Kay Bailey Hutchison Convention Center on Saturday, as many were turned away without a valid appointment. "To me, there’s no excuse for that," Cathy Vernon said. "It's simple math. If you have a certain number of vaccines, you have a certain number of appointments."