Main emergency helpline 911
The Angeles del Pedregal Hospital should have English-speaking doctors you can ask for. If you don't speak Spanish and need to visit a doctor, this app might help you. It gives you translations for common ailments and medicines.
Skyalert notifies you about upcoming earthquakes, which are frequent because the country is located along a subduction zone, suffering collisions between two of Earth's tectonic plates.
Travel insurance isn't mandatory, but recommended. Choose a plan that offers coverage for Covid-19 and unexpected quarantine.
*this information is taken from the official CDC website
There are no vaccinations required for entry to Mexico but check with your doctor if they recommend taking additional ones against:
No. The locals avoid drinking tap water in Mexico because it's not clean enough to drink. Try to brush your teeth with bottled water too.