Medical advice for travelers
Going on a long voyage, you should pay special attention to preparing the travel kit and your body for the trip. And while in developed Europe and the U.S., with insurance, there should be no problems with qualified medical care, in Latin America, Asia and Africa, this issue in the first place in relevance.
In many third-world countries, there is a possibility of contracting yellow fever. Tourists are advised to get vaccinated in advance, especially since without a certificate of vaccination there may be problems with the visa.
In Southeast Asia and Africa, the greatest danger for tourists is malaria. The disease is carried by mosquitoes, so doctors strongly recommend stocking up on repellents, sleeping in rooms with mosquito nets on the windows and wearing long sleeves. There are still no vaccinations against malaria, the only preventive measures are pills (e.g., Delagil).
In Asia, vaccinations against hepatitis A and B, as well as against typhoid and tetanus, would also be helpful. But the most important prerequisite for global health safety is cleanliness. Doctors recommend using only bottled water in all trips or travels, washing hands as often as possible and using antiseptics to treat hands. And pre-prepared first aid kit (with all the necessary medications) will be a condition of psychological comfort on the road!