Allergies can be a real buzzkill, turning a beautiful day into a sneezefest or leaving you with itchy eyes and a runny nose. But what if I told you that allergies are more than just an inconvenience? They're a fascinating and complex phenomenon that affects millions of people worldwide. An allergy is essentially an overreaction of the immune system to a normally harmless substance, like pollen or pet dander. When a person with allergies comes into contact with an allergen, their body produces...