If your dog got loose one day and was hit by a car, you would be extremely sad but you would get over it.
If the same thing happens to your child, you would never get over it, ever.
I will assume that you are not one of those that really equates a dog with a human. You love them but they are still a dog. And I will also assume that you dont really equate your dog to a brother of your son. Just a figure of speech. If those statements are not true, I can’t help you.
Assuming that is true, if the experts say get rid of the dog, you dang well better do it for the health of your son. But I haven’t heard anything that drastic yet.
Remember that saliva is allergic too. If “fun” for a kid to get licked by a dog, but that has to stop.
And right now, you should absolutely keep the dog out of your child’s bedroom. THat is very doable and there should be no debate. If it were me I would also limit the dog to certain parts of the house and absolutely teach him that he is not allowed on the furniture.
I am sure you have googled it and can reduce the allergens but find a good doctor and follow his/ her advice. One thing I haven’t seen mentioned is this product. Might be worth a look:
Do you have an allergic reaction to dogs? Allerpet for Dogs allergy treatment removes dander off the fur to help with dog allergies.
allerpet.com