I need to be really careful here not to tread into any anti-vaxx territory here but this is just sus af. Why would they take a break from the mass-murder of children to ensure those same children are vaccinated against polio?
Not to mention that the vaccine is going to be administered by the UN - an organisation who have lost nearly 400 employees during this holocaust. Why would the Zionist entity suddenly change their tune and say "Oh, right this way, come on in!"
Is it a photo op? Are they legit worried that polio will spread to their soldiers?
There must be some ulterior motive, right? This just doesn't make sense. WTF is going on here?
(btw be warned there's lot of 
antivaxxers in the Twitter comments there, god damnit they make me so mad)
here's your answer
https://euromedmonitor.org/en/article/6456/The-Israeli-army-continues-to-escalate-its-attacks-on-the-Gaza-Strip-during-the-polio-vaccination-campaign