Explanation:

Effective treatment with antiserum was initiated in 1896, but this therapy was supplanted by sulphonamides in the 1930s and by streptomycin starting in 1947.

Answer:

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Explanation:

PLAGUE IS ONE of the deadliest diseases in human history, second only to smallpox. A bacterial infection found mainly in rodents and associated fleas, plague readily leaps to humans in close contact. Plague outbreaks are the most notorious epidemics in history, inciting fears of plague’s use as a biological weapon