Intravenous Injection of Chemotherapy. It is very common for chemotherapy medications to be injected into a vein, or intravenously. In many cases, a nurse or doctor will insert a needle into your vein, often in your hand or arm, and the chemotherapy will be given through there.
5. Box Jellyfish. The Box Jellyfish is arguably the world's most toxic animal and is responsible for over 5,000 human casualties over the past 50 years. These pestilent creatures reside mainly in the waters near Australia, Japan, Hawaii, and the Phillipines.
Without a doubt, the most dangerous animal in the world is the face you see in the mirror each day. Nonetheless, caught off our guard, it is easy for any of the animals on this list to overcome us. All it takes is one misstep on the sea floor, or a really angry buffalo.