Insects are present everywhere as they have the capability to survive in any sort of environment. They are strong enough to survive whether in hot or cold areas.
Most species of insects are parasitic which depend with the host. One of their skills is that they are able to prey off other species involving humans. Their bite can leave sting to skin and in serious cases it can even cause fatal effects like major illnesses.
Insects such as mosquitoes and sand-flies do not just leave sting when they bite, they can also transmit minor and major diseases that can even lead to death if not treated promptly. Other insects like bees, wasps, and ants leave stings that are quite painful and harmful. In some cases, a number of stings by insects mentioned can lead to serious illnesses and even direct toxicity.