A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Were there any diseases before human existence?

Best Answers

Most human diseases are zoonotic, meaning that they originated in the lower animal species. For example, HIV came from monkeys. So animals were getting sick before humans came on the scene. read more

Most human diseases are zoonotic, meaning that they originated in the lower animal species. For example, HIV came from monkeys. So animals were getting sick before humans came on the scene. Other diseases such as cancer also occurred in other species before humans. read more

Encyclopedia Research

Wikipedia: