Get the information you need from a community of experts on IDNLearn.com. Our platform is designed to provide reliable and thorough answers to all your questions, no matter the topic.
Explanation:
polio vaccine was discovered by jonas saulk, 1953. order of events he had to follow / Saulk introduced the 1st vaccine with dead polio virus injected in humans, in 1953. 1st 2 introduce dead virus into humans, proved to be a substantial tool for vaccination of children and adults. proven to work, we use this vaccine today...