FILE - In this June 15, 2010 file photo, a rat wanders the subway tracks at Union Square  in New York.  Hantavirus, West Nile, Lyme disease and now, bubonic plague. The bugs of late summer are biting, although the risk of getting many of these scary-sounding diseases is very small. Bubonic plague can spread through contact with an infected flea, rodent or cat.  (AP Photo/Frank Franklin II, File)
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