According to Baidu Encyclopedia, the so-called germ in the film is Yersinia pestis. Including the introduction of watercress also known as plague bacteria. And the mice and some symptoms in the film also clearly indicate that the bacteria is plague.
And streptomycin was discovered in 1943, as the drug of choice for the treatment of plague, it can reduce the mortality rate to five percent. In other words, streptomycin made the plague no longer an insurmountable disease problem.
The background of the film is the time after the discovery of streptomycin - there are also places where the year appears in the film, such as the Cassandra Bridge being closed for several years, it can be speculated.
So why in the story, instead of treating patients with streptomycin, the government needs to destroy the entire train?
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