While health risks vary from person to person, it is always better to prep yourself before setting off on a trip. Consult your general physician about the following shots before you head out:
Cholera - which is spread through contaminated food and water is more common after a flood situation in Nepal. While it is uncommon to contract cholera if you choose to maintain proper hygiene, it is best to get a precautionary shot before your trip.
Diphtheria - can be contracted via respiratory droplets or if you spend long hours mingling with those affected.
Japanese Encephalitis - is often observed in Asia and is spread through the bite of a carrier mosquito. This type of mosquito breeds in rice paddies and is found around rural areas in the continent.