Swab hands of harvesters or other farm workers in direct contact with fruit and test for bacterial indicators (such as E. coli or fecal coliform) at least on the first day of harvesting and in the middle of the season. When test results indicate fecal contamination, test for Hepatitis A virus (HAV) and Norovirus (NoV). If virus is detected, remove the person temporarily from positions requiring direct contact with food, verify the health condition of the person and repeat test to confirm the infection. If viral infection is confirmed, the person shall not return to work until NoV and/or HAV infection is confirmed negative. Consider increase the number and frequency of test if virus is detected repetitively.