Question

(a) What may be the reason for the disease in city A?

Answer 1

a) We can give reasons for the disease by thinking of the cause of spreads of these particular diseases:

i. The absence of safe supplies of drinking water:

Excreta of someone suffering from an infectious disease like cholera may get mixed with the drinking water used by people leaving nearby. This situation is more likely to happen if the safe supply of drinking water is absent in the city.

ii. Stagnation of wastewater:

Mosquitoes breed in stagnated water and then diseases such as dengue fever and chikungunya spread. Mosquito bites transfer the virus into our bodies making us ill.

iii. Lack of proper waste disposal systems:

Unhygienic surroundings lead to the breeding of rodents such as rats due to which disease such as rat fever spreads.