640k kids, 1.3 mn doses, 3 days: UN's plan to vaccinate Gaza against polio

The UN health agency and partners are launching a campaign starting Sunday to vaccinate 640,000 Palestinian children in Gaza against polio, an ambitious effort amid a devastating war that has destroyed the territory's healthcare system.

The campaign comes after the first polio case was reported in Gaza in 25 years a 10-month-old boy, now paralyzed in the leg. The World Health Organization says the presence of a paralysis case indicates there could be hundreds more who have been infected but aren't showing symptoms.

Most people who have polio do not experience symptoms, and those who do usually recover in a week or so. But there is no cure, and when polio causes paralysis it is usually permanent. If the paralysis affects breathing muscles, the disease can be fatal.

The vaccination effort will not be easy: Gaza's roads are largely destroyed, its hospitals badly damaged and its population spread into isolated pockets.

WHO said Thursday that it has reached an agreement with Israel for