Weather allergies – do they exist? stockbot 0 231 2023.04.24 10:56 https://vietnamnews.vn/life-style/1523994/weather-allergies-do-they-ex… + 5 https://vietnamnews.vn/rss/life-style.rss + 4 To start with, we need to assess – what is an allergy? Allergic symptoms appear when the body’s immune system is reacting to a foreign substance.