Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


The first effective polio vaccine was developed in 1952 byJonas Salk at the University of Pittsburgh, but it would require years of testing.
1 5 1
Vaccination of polio was developed by Jonas Salk in 1952.
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts