Quoting It's Delivered:" I say a mama knows her child best, if she doesn't have a fever and wants to go to school I'd send her."
If she's Set in her Routine, even if Not Autistic, I would be hard pressed to Not send My Child!
But if I had a Hard Set Autistic Child I would find it really hard to Keep them Home for all but the hardest illnesses. With all the Disruption's it can cause to Everyone's Life including when they Get Back to school, it's not worth the Trauma.
That however could change if there was any Immune-compromised Classmates involved.
Alot of times my Kids Look, & Sound sick when they're not really. But we have Perfume Allergies, & those are A Nightmare Beast!