An earthquake occurred in Concord.

An earthquake occurred in Concord. wave of the earthquake destroyed the water pipe system of the city and thus Aeromonas hydrophila, a bacterium that is very toxic to many organisms and travels through the bloodstream, contaminated tap water of residents in Concord. In order to prevent the bacteria's infection, residents in Concord are going to drink bottled water. But both tap water and bottled water are flowed in tap water pipe, which was destroyed by the wave of earthquake, before drunk by residents. Therefore, drinking bottled water cannot reduce the number of infected residents.