In America's four largest cities, at least half of people say they have experienced the loss of a job or a reduction in wages or work hours in their household since the start of the coronavirus outbreak. That's the finding of a new poll published Wednesday by NPR, the Robert Wood Johnson Foundation and the Harvard T.H. Chan School of Public Health. Many of these problems are concentrated among Black and Latino households in the four cities, according to the poll, which gathered responses from July 1 through Aug 3.