The CDC (Centres for Disease Control and Prevention) and WHO (World Health Organization) have a comprehensive database for all travel-related medical considerations. Additionally, the ISTM (International Society for Travel Medicine) and ASTMH (American Society for Tropical Medicine and Hygiene) carry the latest knowledge on the safe practice of travel medicine. The complex nature of travellers and the care they need has expanded. Hence these organizations provide essential resources for tourists to fall back on. There are several public health departments monitoring the nature of illnesses faced by new-age travellers. Travel related medical issues are evaluated and updated on the websites of these organizations. There are many books too that can help in judging the kind of diseases prevalent in the destination country.