Rats were not to blame for spread of plague during Black Death...rodents and their fleas were thought to have spread series of outbreaks in 14th-19th Century Europe...team from universities of Oslo and Ferrara now says...can be "largely ascribed to human fleas and body lice".

submitted by /u/madazzahatter
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from World News https://www.reddit.com/r/worldnews/comments/7qp691/rats_were_not_to_blame_for_spread_of_plague/