    Sentence 1: How and.when did the first variant of  y. pestis enter Europe?    Sentence 2: Zoom. showed the Y. pestis genotype  responsible for the pandemic that spread through  the Low:Countries from 1350 différed from that  found in'Britain. and France, implying Bergen op  Zoom (and possibly other parts of the souttiern  Netherlands) was not directly’ infected’ from  England. or. France: in’ 1349 ‘and ‘suggesting a   second, wave of plague, different from those in  Britain and France, may have been carried to.the  ‘Low Countries from Norway, the Hanseatic cities  or another site:    