Hello ! I'm planning a trip to Bali and Lombok sometime around October for one month. I've been reading about the recommended vaccines and have doubts about the Japanese encephalitis one. Is it really necessary?? because the side effects look quite scary! Also should I take the malaria prophylaxis? Thank you!!

More info than you probably want on immunizations here.

There's also some articles on our Bali travel guide that will be helpful:

Disease and treatment in Bali

Vaccines and Travel: Indonesia