If California had stockpiled enough masks and other protective equipment, at least 15,800 essential workers would not have contracted COVID-19, and the state would have saved $93 million weekly on unemployment claims, according to a UC Berkeley Labor Center report issued this week. "It was one shocking number after another as I looked at this," said report co-author William Dow, a professor of Health Policy and Management in the School of Public Health at UC Berkeley. "Based on these numbers, we should be building a stockpile for the future."