Epidemic Diseases

We watched a video about human population and epidemic diseases today. Increase of human population has speed up and intensify the spread of diseases. Most epidemic diseases like HIV and AIDS were once exclusive in wild animals and later became adopted to human bodies. Most disease still stay in the first stage, spreading only within a specie. It would be hard for virus to adopt into a different species, humans, unless we are unaware or ignore this change. The speaker said that if all lives are to be written into a series of books. The first four books will be about virus, bacteria and microbes, while all plants and animals will be in the last book and humans will just going to be a footnote. True. We should investigate more on the fundamental level of diseases' origin rather than forces on the highest and narrowest level of spreading among humans, which is troublesome like a malignant cancer.