ok... what you need is..

a good supply of evervesant 1000mg vitC tablets one every day!!! is a must.

you may want to take a paket of imodium just incase.

i spend most of my time all over the world with my job.. vit c tablets keep most things away.

you will be fine. try to steer clear of street food.. but if you feel the need then go for it..