    Sentence 1: Why might the temperature  affect the theory of plague spreading?    Sentence 2 In addition to arguing, that  the rat population, was. insufficient to  account for a bubonic plague pandemic,  sceptics of the bubonic plague theory  point out that the symptoms of the Black  Death are not. unique (and arguably in  some) accounts may differ from bubonic  plague); that transference via, fleas. in  goods. was, likely to. be of _ marginal  significance; and, that the DNA. results  may be flawed and might not have been