1 critical element was a scientific being familiar with regarding the virus itself. Virologists had come to believe that variola could endure and replicate only inside of human beings. Lots of viruses that cause disease in humans may also infect animals — think about Jenner’s cowpox. But variola experienced shed https://bookmarkquotes.com/story16966730/5-essential-elements-for-culture-of-the-united-states