Before traveling, it is advisable to consult with your doctor. Good nutrition, moderate physical activity and hardening (without fanaticism) will also help reduce unpleasant symptoms.
Eat only in restaurants recommended by the travel company. Avoid random diners and street food from the trays. In no case should you eat raw fish or seafood - there is a high probability of poisoning.
Before eating, be sure to wash fruits and vegetables with boiled or bottled water - that is, not from the tap (if you are in hot tropical countries). You also need to drink only water bought in closed bottles.
If you are in a country where there are blood-sucking insects - mosquitoes, horseflies, midges - remember that they can be carriers of various diseases. In the evening, wear long-sleeved clothing, trousers, boots - especially in countries where there is a danger of getting malaria. Before traveling, evaluate the risks that may arise.
If necessary, get vaccinations that your doctor will recommend.
In order to more easily transfer acclimatization, it is necessary to maintain immunity. Standard recommendations are suitable here - good nutrition, compliance with the regime of work and rest, good sleep, moderate physical activity and contrast shower. Please note that we are not talking about taking any special drugs to increase immunity. In principle, it’s not worth taking anything for nothing, without a doctor’s prescription.