The first round of the polio vaccination campaign in the Gaza Strip has been successfully completed, the head of the World Health Organization (WHO) said on Friday. More than 560,000 children under the age of 10 have received a first dose of the vaccine, said Tedros Adhanom Ghebreyesus in a post on X. “This is a massive success amidst a tragic daily reality of life across the Gaza Strip,” he added. The WHO and partner groups negotiated temporary ceasefires with Israel and the Palestinian militant group Hamas to enable families to bring their children to vaccination centres and mobile vaccinati…