What STD can you get even with a condom?
The correct answer is "all of them." However, there is a caveat: condoms are more effective against some STIs than others. They're extremely effective against things like HIV and hepatitis. Not perfect, no, but still hugely effective. They're less effective against herpes and HPV, because herpes and HPV do not require fluid exchange; they can be transmitted by simple skin-to-skin contact.