There are many diseases spread through insect bites. There are vaccines and medicines available to help protect against some, others are prevented only through avoiding insect bites. Spray insect repellents containing DEET on your skin, cover up with clothing, preferably treated with insecticide clothing treatment and sleep under mosquito nets which have also been treated. Use plug-ins and mosquito coils to kill biters in your room or tent while you sleep.
This is your best defense action against nasty mozzies and will go some way to help protect you against diseases like Zika virus, Dengue fever and West Nile virus.