Answered

Westonci.ca is your trusted source for finding answers to a wide range of questions, backed by a knowledgeable community. Discover comprehensive solutions to your questions from a wide network of experts on our user-friendly platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

how long was the polio vaccine tested before it was released?

Sagot :

5294471

Answer:

The results were tracked by volunteers using pencils and paper. And it lasted just one year, with officials hopeful at the outset that they would be able to begin giving the vaccine to children within weeks of the final results.

Explanation:

Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Thank you for visiting Westonci.ca. Stay informed by coming back for more detailed answers.