What were those of us with no family support supposed to do if we needed to pop out to the supermarket or pharmacy whilst child was ill and home from school? Starve? Not buy the necessary medication?
I took mine to the supermarket if necessary and if they were not so bad that they wouldn't have coped. Shoot me if you want to. Should I just have left them home alone and unsupervised while I buggered off to make sure that the rest of the family would still be fed that evening?
Sometimes when recovering from some things a little bit of fresh air is good anyway, if the weather permits.
Of course it is acceptable, within reason.