In case it is of use to you or anyone else, this site has some excellent tips for stayig healthy while traveling,

www.mdtravelhealth.com/illness/

The author is a very well qualified MD who has specialized in Travel Medicine and Infectious Diseases.

He includes some good links for additional information (WHO, CDC, others). Self-education from reliable professional sources like these seems to be one of the best things for staying healthy.

(There is also detailed updated information for individual countries, www.mdtravelhealth.com )