Malaria risk in Mexico is classed as very low. For most travellers, this means bite avoidance and awareness rather than routine malaria tablets. That is useful to know, because malaria often gets the search traffic while dengue, Zika and chikungunya are the mosquito-borne infections more likely to shape the advice. These infections are spread mainly by mosquitoes that bite during the day, including around towns and built-up areas. Repellent, loose long sleeves, covered ankles and accommodation with screens or air conditioning still matter. Hepatitis A is commonly recommended for previously unvaccinated travellers to Mexico because it spreads through contaminated food and water. Typhoid vaccination is also often considered, particularly for longer trips, smaller towns, visits to friends and relatives, or travel where food hygiene may be less predictable. Tetanus should be up to date, especially if you may be far from prompt medical care or doing activities where cuts and scrapes are plausible. Rabies is present in Mexico, including risk from domestic animals, and bats can carry rabies-like viruses. Pre-travel rabies vaccination is worth discussing for children, runners, cyclists, animal work, rural travel and stays over a month. It does not remove the need for urgent advice after a bite or scratch, but it can simplify treatment. Altitude can also catch people out. Mexico has high ground, and places such as Mexico City or mountain areas can affect sleep, breathing and exercise tolerance, particularly after a rapid arrival.