Polio is now rare because widespread vaccination was implemented. Sometimes, diseases crop up that warrant that. Is this HPV one? I don’t know. That’s still to be decided.
Polio HAS NOT been eradicated worldwide, only smallpox has. An outbreak of polio would be devestating and could spread very quickly.
The difference between polio and HPV is that polio spreads through NORMAL contact and HPV is sexually transmitted. A responsible person is 100% immune from HPV WITHOUT a shot.