Lack of potable drinking water, poor sanitation conditions and hygiene, and lack of information

all help spread rotaviruses. These conditions are frequently found in developing countries.

Typhoid fever is very much prevalent in developing countries, where sanitation is poor and personal hygiene is not good.

BETHAN EMMETT has written:

'IN THE PUBLIC INTEREST: HEALTH, EDUCATION, AND WATER AND SANITATION FOR ALL' -- subject(s): World health, Water-supply, Developing Countries, Sanitation, Education, World Health, Water Supply

because yesterday i was going on a walk in the car with my dog/fish and then i was in a store with cow's and then i bought shoes for my cow that used to be a dog and then 6.

That is a very intelligent question! Typhoid disappeared from all the developed countries by 1940 by improved sanitation and good personal hygiene. Incidentally they were all Christian countries. Typhoid was rampant in developing countries by that time.