What is in the air???

Everyone is sick right now, with runny noses, headaches, sore throats, etc. I assumed it was allergy season because the wild flowers are blooming, but its spreading?? Allergies don't spread, you can't catch a pollen allergy from someone. So why is it multiplying?? Pls tell me this isn't just me. It's gradually spread through my family, and half of my classes are empty because so many people are ill 😭. Does anyone have any remedies other than antibiotics, from what I've found, hot water with tumeric, salt, lemon juice, and a tea works wonders, but any dairy makes you sick.