Mosquito
The mosquito may be one of the smallest animals in the whole universe. However, despite its size, it is considered the most dangerous animal on the planet. The danger lies in its ability to bring a diseases to more than 700 million people in all countries. Some of these diseases are highly contagious. H-fever, zyka, and cholera are just some of these diseases. There is just so much going on with mosquitoes that they cause about 3 million deaths annually.