acording to the following link :The History of Vaccines. Accessed at Early Tissue and Cell Culture in Vaccine Development at…

acording to the following link :The History of Vaccines. Accessed at Early Tissue and Cell Culture in Vaccine Development at http://www.historyofvaccines.org/content/articles/early-tissue-and-cell-culture-vaccine-development on September 16, 2016.

  1. Before the 1950s, why was it so difficult to grow viruses in labs?
  2. Who are some of the pioneers in the development of viral culture methods? How did they change the state of medicine?
  3. How has the culture of viruses in the laboratory affected vaccine development?