© Gabrielle Lurie / The Chronicle California caps off July as deadliest month since pandemic began Nurse Rosemary MacLeod (left) performs a Covid-19 test on nurse Pauline Tran at Laguna Honda hospital on Thursday, June 25, 2020 in San Francisco, California. California became the first state to surpass 500,000 confirmed coronavirus cases Friday, capping off a month that saw more new …