About the book: 2021 / Scientae Vulgaris is a well-known blog whose goal is to popularize science. The author, hiding under the abbreviation SV, has been studying the history of medicine for more than 5 years. In his book, SV will tell how, from eating compressed leaves of a tropical tree, the great and mighty genus Homo came to the invention of the first vaccine, how, as a result of the continuous interspecies struggle of Homo, transforming medicine weaponized, spread across the Earth like a virus. Publishing layout saved in PDF A4 format.