Explain any three factors that led out the outbreak of bubonic plague in the modern part of hanoi in 1903
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during heavy rains or floods the refuse from the old part of Hanoi overflowed into the streets of the modern french part of Hanoi
the large sewer in the modern part was an ideal protected breeding ground for rats
it was also a great transportation facility for the rats to move around the city
the ineffectiveness of the rat hunt bounty program
the large sewer in the modern part was an ideal protected breeding ground for rats
it was also a great transportation facility for the rats to move around the city
the ineffectiveness of the rat hunt bounty program
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