I think that is untrue. I think it would be true to say that some allergies cannot be mitigated. But not all and certainly not in children.
Many children outgrow childhood allergies.
I have had some experiences with that personally, but everyone does not react the same or have the same reactions.
Recently there was a paper on the peanut allergy that as most know can be fatal. In this case they introduced peanuts to a child in very small micro amounts under medical supervision. They actually were able to fix the problem.
Works in pets too. I have a weinerdog that was allergic to a particular flea chemical. But without it, in the south, he was being eaten by them as well as mites..So finally I had to do something so I went to the farm supply store and bought a bottle of the chemical. I diluted it into a spray using 1/8 teaspoon to 10 ounces of water...sprayed him, and no reaction....raised the amount to 1/4 teas. and I got a hive breakout so I backed it off to the 1/8 and continued for two weeks...spraying him everyday. Long story short, within 3 months I had increased the dose to the level of a flea bath mix and then applied the monthly flea application that is 50% Permethrine, and he now has no problem with the chemical..
Having said all that, I would limit the contact with the puppy. Just having the dog in the house should give enough exposure and if that is too much, you might think about not having a pet until he stops showing allergy signs. As the child will certainly come into contact with many pets over time...and some Diphenhydromine would be helpful. (benadril) But be careful with it....it will put then to sleep....they have a dose for kids, or did....(long time since having kids around)
A person can’t build up an immunity from uncontrolled casual exposure. If that were true, allergies wouldn’t be a problem. However it is possible for some to do it gradually and in precise steps through a lengthy series of allergy shots. Growing out of an allergy is unlikely, but sensitivity with age can change, and more likely a person learns to avoid or limit exposure as they grow older.
My second wife could not overcome her allergic reaction to me. Shame. Come to think of it the first one had the same symptoms.
I totally agree.
It is not unusual for the immune system to react harshly the first few times it is exposed to something it never saw.
My bet this is that kind of reaction and that it will settle down.
One of two things is likely:
It will calm down and no longer be a problem, even though the child may always have some minor sensitivities... OR!
It will get much, much worse. Fairly quickly. A good indicator would be to take the childs temp when he hasn’t been exposed and after he has been exposed. If you see his temp jump more than a degree or so after exposure, that sounds like a bad sign to me.