Israel’s military and Palestinian militant group Hamas have agreed to pause fighting in three separate, zoned three-day instances in the Gaza Strip to allow about 640,000 children to get vaccinated against polio, according to an official with the World Health Organization (WHO). Vaccinations are scheduled to begin Sunday, said Rik Peeperkorn, WHO’s senior official for Palestinian territories. Both sides have agreed to stop fighting between 6 a.m. and 3 p.m. (0300-1200 GMT), Bloomberg reported. The vaccination campaign is expected to pause fighting for three days in central Gaza and then southe…