Well then put on your mask, and give them the antidote as if you were one of their own. I mean siriously what is more important? Lives or possible damage in the far future.
btw.. i truly hated the episode where archer decided to not help to create cure, because this other species has a change to become superiour and all that stuff.. It was the episode where two different species have

"evolved"

from the same planet and the superiour race is getting ill and will die in the future if nothing is done. The views and ignorance of some people is just stupid (i'm talking about the writer(s) of that episode, don't know who is it..)