This will be my third time there. The first time I was there I got fever a week before I left and was off work for one week when I returned.

The second time I was there I got fever and was nearly vomiting in the first week. Second week I was ok. Third week, fever and again nearly vomiting.

Could this be because of the heat? Or because I brushed my teeth with tap water? Or because I need to drink as much bottled water as I can?

Or is it because I didn't get any jabs?

I've got an appointment with the nurse at my doctor's surgery. What free jabs should I ask for?

The place I'm going to is Cabanatuan in the North Philippines. It is in the countryside.