San Diego County opens fourth vaccine 'super station' in La Mesa Another vaccine "super station" opened in San Diego County on Tuesday. and last updated 2021-02-02 15:50:39-05 SAN DIEGO (KGTV) â San Diego County on Tuesday opened a fourth vaccine "super station" in La Mesa, in an effort to ramp up the speed at which COVID-19 vaccines are administered and expand access. San Diegans who currently qualify under the state's COVID-19 vaccine distribution phases will be able to set up an appointment starting on Feb. 2. The La Mesa site will be a walk-up location at Grossmont Center shopping mall at 5500 Grossmont Center Dr.