2 How can travellers protect themselves?

Travellers can protect themselves by visiting their doctor, taking required medication and a first-aid kit, drinking water, getting exercise during long flights, stretching every hour, drinking plenty of fluids, watching what they eat and drink, sticking to bottled water and drinks without ice, eating well-cooked foods, choosing fruit that hasn't been peeled, keeping their hands clean, putting on bug spray, and sleeping under a mosquito net.