Mosquito
These tiny insects are some of the most dangerous animals in the world. While they’re found everywhere in the world, they’re only deadly in Africa, South America, and Asia, where they carry debilitating diseases like dengue, yellow fever, West Nile virus, Chikungunya, encephalitis, elephantiasis, and the Zika virus. Over 700,000 people die every single year from a mosquito-borne disease. For example, if you get bit by a mosquito carrying dengue, victims get a high fever, severe dehydration, headache, body aches, and in more severe cases, internal bleeding, which can eventually lead to death. You’re even more vulnerable if you have a compromised immune system or are a child or the elderly.

Even though wearing long sleeves and pants, staying inside at dawn and dusk when the mosquitos are most active, and wearing mosquito repellent will help prevent these diseases, some people will still catch them if they’re unlucky. You have to be especially careful if you’re in an area where there’s an outbreak of malaria, dengue, or any of the other diseases since it increases your chances tenfold of catching the virus (Flamingoof).