Smallpox kills billions of people and how medicine defeats them!
10,000 years ago, a deadly virus 'hit' in northeastern Africa, they spread through the air, attacking the victims' skin, bone marrow, spleen and lymph nodes.New discovery about the source of smallpox vaccine preparation
The first vaccine to appear in the world and considered one of the greatest mysteries in medical history, can be prepared from horse bean virus, not cowpox virus, as everyone