Replies(14) Registered nurse Emily Enos attempts to extract an extra dose of the Moderna COVID-19 vaccine outside the Los Angeles Mission located in the Skid Row community on February 10, 2021 in Los Angeles, California. ( Mario Tama/Getty Images) LOS ANGELES, CA — For the second week in a row, Los Angeles County will use the bulk of its vaccine supply to administer second doses for residents. The county's mass vaccination sites will exclusively administer second doses health officials announced Friday. That means that for the second week in a row, Los Angeles will make only limited progr...