In 2012, Chris Kelly caught a cold, which then moved into her sinuses. It was a run-of-the-mill nuisance, until she woke up one morning and realized her condition had become something far more serious.
"I opened my eyes, I went into the bathroom, I uncapped the toothpaste, and was immediately aware that I couldn't smell anything," says Kelly, who was born in Maine and now lives in the United Kingdom.
This wasn't a stuffy nose. This was like the on/off switch had been flipped.