If we are talking about realistic worlds? Congratulations. You are the willing recipient of one/or more SPACE PLAGUE. At best, you can never return to Earth (hope you said your goodbyes). At worst, you will die of alien pathogen thinking you are space furry, causing horrible painful skin blisters, while your every hair burning like a thousand suns.

But this is GRRRLPOWER!! Technology is Magic!
Hmm.. if we are being completely realistic.
Then should you not be to alien for a space plague to work on?

And else, we have a situation where countless worlds intermingle.
There should be procedures in place to handling a virgin immune system being introduced to something it has newer encountered before.
Else worlds like the Nexus trading station would be impossible. In part because following that logic, then your new crew would at the same time die from a cold.