I don't suffer from hayfever, thankfully, but seem to attract every biting insect for miles around I have been bitten several times in this last week & have been getting bitten since April, I get a very bad reaction to them too & the area swells up for days (as well as itching like mad!). We get loads of mosquitos round here & they usually don't get killed off due to our mild winters either. I have had to have a door screen fitted to my back door so that I can get air in without the flies etc.. but unfortunately they still make their way through the open windows, I even have one of those UV blue light zapper things to try & keep the numbers down