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Date: 2013-01-18 03:29:19Rickettsioses Old World rats and mice Cat health Fleas Biological weapons Typhus Black rat Oriental rat flea Rickettsia Biology Bacteria Medicine | Prevention and control of urban typhus in Hong KongAdd to Reading ListSource URL: chp.gov.hkDownload Document from Source WebsiteFile Size: 558,28 KBShare Document on Facebook |