If the battle to eradicate polio were an action movie, this week would be the part where the good guys have racked up spectacular victories – but look like they may lose anyway. On the spectacular side, polio may be gone in India. Of the four countries where polio remained entrenched, the giant country was expected to be the last to fall. Yet its most recent case was in January this year, whereas by this time last year, it had had 40 cases.