Seasonal Affective Disorder—or SAD—might be one of the most appropriate acronyms in medical history. It’s a depressive condition that reflects the ultimate battle between light and darkness—sunshine hidden by clouds, and sunsets happening quicker and sooner than ever. As a result, symptoms usually start in the fall, and subside in early spring or summer.

There’s nothing that will ruin a beautiful crisp, cool day faster than the tickle at the back of your throat that heralds the oncoming of a common cold. A cold can knock you on your back and make you feel like you’re a relentlessly dripping nasal faucet.

According to The World Health Organization, there are officially more than 12,420 different, documented diseases in the world. Most of us, especially in this part of the world, have it narrowed down to just a few.