you need to keep up on thise for them to be effective. Allergens change over time as humans change their environment (for example new housing brining in different types of plants, airborne particulate shifting due to global events, etc...) and our tolerance to things changes as we age too. Sucks.I think the immunity from the allergy shots I got years ago must have waned. I've noticed the past couple of years that I've been feeling the allergies more and more, and these past few days have been as bad as anything I ever experienced. I might have to see about doing them again
