Due tonight
which influence is internal?
health knowledge
likelihood of getting certain diseases
cultural background
media messages

I wouldn't be entirely sure but i would have to go with likelihood of getting certain diseasesd. I think this because interal means on the inside.

Explanation:

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.

answer; hepatitis a& b can be passed through breast milk; (true);