Is 37.4 considered a low-grade fever?

Ok, believe it or not this is not a paranoid question.
I’m actually asking as my daughter is quite often sitting at 37.3 or 37.4.
She quite often get’s sick, but she is at preschool so I’ve never questioned it but she did get bloods recently as she was vomitting for no reason and her IGa levels were low so we need to retest again soon.
I will go back to the Dr and ask these questions but I’m wondering if anyone has a child that is similar and it’s just ‘them.’
I am not overly concerned about temp as it’s also hot here at the moment, so I’m assuming her young body may not regulate as well as adults.(?)
By they way most of you know I suffer badly from hypochondria but I don’t have it with her it’s only with me.
I’m genuinely curious to see if some children just run ‘hotter’ than others.