One particular important component was a scientific knowledge about the virus by itself. Virologists had come to think that variola could survive and replicate only inside of human beings. Quite a few viruses that lead to condition in individuals might also infect animals — think about Jenner’s cowpox. But variola https://olivebookmarks.com/story17012069/new-step-by-step-map-for-culture-of-the-united-states