have a look at www.is-fiji-safe.com for a list of vaccinations. But in practice as long as you're staying on a resort you won't need anything.
Occasionally there's an outbreak of typhoid in rural villages (heavy rain and no sewerage system will do that), but (sadly) usually only affects locals.
There is no malaria in Fiji, but Dengue Fever is a problem. No vaccine for Dengue Fever, the best option is to use lots of DEET insect repellant, cover up with long, white, loose fitting sleeves and pants and sleep under a net if there are mosquitoes about.
Bula! about 8 years ago
Definitely go out to one of the villages for a day trip. The people are so friendly and you get to see how they live day to day. We went to Namuamua Village and was fantastic, the kids had an absolute ball. We also spent a day driving to Suva and having a look around the markets and shops there, it was an eye opener for the kids. Shop at Jacks which are souveneir shops in major resorts and towns we got back into Australia with everything we purcahsed. about 8 years ago