I was in Honduras this past September(the Bay Islands). I got sick on my last day, came home violently ill.
But that's what happens when you wander round Mexico & Central America, sooner or latter, everyone gets
sick.
Yeah just don't drink the water and be cautious of your food. Mosquito net and a long sleeve shirt or two
are also a good idea. You'd be surprised how comfortable a long sleeve shirt(cotton) would be in the jungle.
Make those damn bugs work for their meal, lol. Silk is also not a bad idea, mosquitos can't bite through it.
Mosquitos are the main thing I'd be concerned about, It is far easier to steer clear of a street food vendor
than it is a little mosquito which you probably won't see. After all malaria is still the number one killer
worldwide of people. Malaria is treatable if you catch it early enough though. And anti-malaria drugs
are probably far cheaper in Mexico where you don't even need a prescription. Do be aware of "Lariam" aka
"Melafloquine", that shit will fuck some people up, I never made it to Ghana cause I was tripping my face
off from that shit(no, a long term bad trip is not cool!). Some people do OK with it though, just bad dreams
and restlessness. In Honduras I used no anti-Malaria meds and was fine, I was just careful.
Just do your research, know what to expect health wise, and let everything else that happens be the adventure!