Which factors can contribute to the
spread of viruses?

Weak immune system, and lots of contact like one person coughs in and elevator you have a chance of getting the cold because your exposed to the bacteria through the air .

precipitation, humidity wet hot environment ,

the number of people with whom an infected person comes in contact; and,

Virus transmission is affected by a number of factors, including environmental determinants, host behavior, host defense mechanisms, and virus infectivity. Uncertainties remain with respect to the relative importance of these factors and the roles that they play.

Explanation:

explanation:

it's important for any number of settings.   but then i'm a retired teacher and my view may be biased.

it certainly will not weigh as a minus when applying to a college, while poor grades always work against you.

other factors are important like what you do to improve the community.  

you have to write the essay, it counts as cheating if i do. so just use your brain; you're a smart kid. you can do it. : )

explanation:

nah. i'm good.