Israel's military and Palestinian militant group Hamas have agreed to three separate, zoned three-day pauses in fighting in Gaza to allow for the first round of vaccination of 640,000 children against polio, a senior WHO official said on Thursday.

The vaccination campaign is due to start on Sunday, with the pauses scheduled to take place between 6 a.m. and 3 p.m. (0300-1200 GMT), said Rik Peeperkorn, the World Health Organization's senior official for the Palestinian territories.

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