Every flu season — and especially during the dire ones, like 2017-18 — health officials shift into overdrive, imploring employers and schools to disinfect doorknobs, promoting extended hand washing with soap, among other preventive measures. Problem is, this advice falls …

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When a hospital patient checks out of a room, cleaning staff swoop in, attempting to disinfect surface and piece of equipment to prevent the spread of infection. The TV remote, bed frame, call button cord, trash can lid, closet handles, …

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