Vaccines saved 1 cr lives, prevented 450 cr cases: Study
Vaccines in a 52-year period prevented an estimated 450 crore cases of many infectious diseases and saved more than one crore lives globally, a US-based study has revealed. Vaccinations for diseases like polio, measles, rabies, hepatitis A, among others, were made possible due to the development of a human cell strain called 'WI-38' in 1962 by American biologist Leonard Hayflick.