Teachers should definitely contact Laura's mother. ( or any relative is she can't go to pick her up)
Maybe Laura's mother thinks her daughter only has a sore-throat or a simple cold and that it will go away on a day or two. Or maybe, it's just allergies, as she said.
However, if Laura also has fever and swollen glands, she might have STREP THROAT, Â which is cured with antibiotics. Also, it is contagious, as it is spread by close contact by coughing and sneezing, also by sharing food and drink, so Laura shouldn't be in contact with other kids.
The most characteristic symptoms of strep throat are sore throat and painful swallowing. Other symptoms include:
If Laura doesn't get treated, it might evolve into otitis, sinusitis or pneumonia. Rheumatic fever is also a serious complication of strep throat.