I’m assuming u don’t know it contains pork gelatine. The reason I’m asking is because parents are having debates about it and some argue it’s not permissible due to that, but some are arguing it’s not consumed via mouth and that it’s for medicinal purpose to keep the kids healthy. Alternative is a less effective injection, which is a hassle on its own to convince a child to get a needle in their arm.
I’ve never had to get flu spray/jab for my kids before, but now I’ve moved to Scotland and it’s highly recommended here with the weather being more extreme than London.

I did enquire regarding this from Agha Sistani’s office and they said it’s fine due to being for medicinal purpose.