honey is fab and interesting stuff, and am sure is going to be used in some medical way once approved one day. (if we can all keep them and therefore us, alive. once bees go, we all go!)
however its not going to be used for treating hay fever.
it does soothe sore throats etc.
but, the reality is that the pollen bees eat and collect are not the ones that cause the majority of hay fever problems.
its the finer pollen grains that are airbourne, that are the issue here, not the ones that require insects for reproduction.
also, the idea of small amounts triggering tolerence is used for example in inducing peanut tolerence , to do the same requires individual tailored amounts of pollen for each person. It also has to be taken over a LONG period of time in increasing amounts to push the tolerence level.
so, even if you buy local honey, you have no idea that it even has your allergen in it. and if it has it there is the correct amount for you, to trigger antibodies.
Most people havent had any formal testing for what they are allergic to, and tend to use guess work. often advised to make a note on the calender and look up the timing of seasons for plants etc.
However weather does have an impact, wind etc good and bad.
how can you tell that magic honey is working recently if the weather is reducing your local area pollen levels?
Also people with seasonal hay fever, forget to take antihistamine daily two weeks before season nears, to give build up effect, and so receive little benifit from the antihistamine.
other non drug ways of reducing impact of pollen on body can be implemented in a combination and can help. However for those with very severe hay fever, there are nhs treatments, oral treatments, but steriod injections are to be avoided.
The UK no longer approves on nhs for injection treatments for environmental /hay fever due to concerns for safety. However is still available in other countries.