![TIL there are no tests that can confirm tetanus [760x1325 - 195KB]](https://pic8.co/sh/78Qw7L.png){kind=link}
Check the decline of polio before vaccine invented. Look at chart that goes back to late 1800s
Check the decline of polio before vaccine invented. Look at chart that goes back to late 1800s
Check the decline of polio before vaccine invented. Look at chart that goes back to late 1800s
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