Vaccine-related: The reason that the usa switched back to the killed polio vaccine is that, by then, there was no wild-type polio in the country but a handful of cases occurred related to the live, attenuated oral vaccine.
Answered 6/29/2014
5.7k views
5 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
5 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question