Boston (CBS)-A new study in a Boston grocery store investigated the faces of workers at risk of COVID-19.
In May, the study surveyed 104 employees and found that 20% tested positive for the virus. However, three-quarters of workers who tested positive had no symptoms. Researchers say this means that these workers are an important source of transmission, even if they don̵
Since the beginning of the pandemic, more than 16,000 grocery stores across the United States have been infected or exposed.