The incidence of AIDS is increasing, especially among prostitutes and intravenous drug users. Malaria is a problem in rural border areas, but not in Bangkok or other major tourist destinations. Doctors and hospitals often expect immediate cash payment for services, and foreign medical insurance is not always valid abroad. No specific inoculations or vaccinations are required for entrance into Thailand unless you come from a country suffering an outbreak of cholera, smallpox, or yellow fever. Be aware that the air pollution in Bangkok is severe.
Banks generally offer the best rates.
Internationally-recognized credit cards such as American Express, MasterCard and Visa are accepted in major hotels, restaurants or shops. It should be noted, however, that a surcharge is sometimes added when payment is made by credit card. Credit cards and travelers checks are not used as much outside of Bangkok and other tourist areas - cash is expected. The Thai currency unit is the baht , trading in mid 1998 at approximately 40 to the U.S. dollar. Bangkok International Airport is located about 30-45 minutes outside of Bangkok city, with a current maximum passenger capacity of 16 million and connections to major cities through Tokyo and Hong Kong.