They may not have day care and or time off options as parents. So they give them tylenol get the temp below 99.9 and send them to school, if they stay a 1/2 + it may not be considered missing a full day. Those are a couple of other reasons....
“... so they give them Tylenol...”
When my kids were in elementary school, a parent told me the “trick” to getting the kids to school if they were sick was Tylenol (drops the temp more quickly) and then Motrin (keeps the temp lower for more hours). Now.. the “trick” was to dose them as you were dropping them off or before the bus stop... last minute. By the time the poor kids temp spiked... it was after lunch.. and then the nurse would call the parent. The parent would say that by the time they got to school, it would be at closing. So they had to be kept in the nurse’s office. Needless to say... I was shocked at the concept that your own child was sick and you couldn’t or wouldn’t stay home with them. To me.. it is neglect.. but that’s me.