Polio vaccination campaigns started in 1955. This is how well they worked: No cases have originate

0
401

Polio vaccination campaigns started in 1955.

This is how well they worked: No cases have originated in the U.S. since 1979

 Polio vaccination campaigns started in 1955.

This is how well they worked: No cases have originate

Source: Bloomberg Markets

Our Twitter for Quick Updates: Twitter Follow Us

This site uses Akismet to reduce spam. Learn how your comment data is processed.