Vampirism, as a concept related to folklore and mythology involving blood-sucking creatures, did not exist 20 million years ago. The term "vampire" and the concept of vampirism as we know it today originated much later in human history.

20 million years ago, during the Miocene epoch, the Earth was inhabited by diverse species of mammals, birds, reptiles, and other organisms. However, there is no scientific evidence to suggest the existence of vampire-like creatures at that time.