substances that can prevent but not cure a disease????

I did the others with my dad.

is it vaccine?????

4 answers

Right.
wow!!!

Because i was thinking of that and ask if I was right.

Thanks!!! :)
PS: don't wrry about the other post i post about the other question my dad help me.
Great! I'm glad you and your dad are working together on this assignment. :-)
Yup! :)