Answer:
Indirect transmission can occur through air, vehicles such as water, food and contaminated objects, or via a vector such as a mosquito. A susceptible host is a person or animal who can develop infection if exposed to the infectious agent. Susceptibility is increased if exposure is high, or the host's immunity is low.
A, disease transmission. Nutrition guidelines and restaurant inspections are there to improve people's health. City politics doesn't necessarily have a negative influence on health, although it can.
Smokers, who are exposed to secondhand smoke, evokes craving to the smoker according study funded by the National Institute on Drug Abuse, part of the National Institutes of Health. The same thing happens to both smokers and nonsmokers when exposed to secondhand smoke for an hour.
