The Horseshoe Lot COVID testing site, set up to handle the Omicron surge, will close on Friday, Feb. 4 at 10 a.m. Testing for those working at Lab sites will still be available in the lobbies of Potter Street and the Building 50 auditorium, and in room 220A next to the kitchen in Building 76. https://covid.lbl.gov/home/testing-at-the-lab