Janitors are among groups more likely to contract the flu, according to a study. "They're cleaning up after us, disinfecting surfaces and touching things that are handled a lot, like door knobs, and handling materials and other things that could be contaminated," said study co-author Naomi Anderson. Sergio Salinas, president of Service Employees International Union Local 6 in Washington state, says increased workloads are a contributing factor.

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