For Janet Marple, 54, of Edina, Minn., coffee, peanut butter and feces all smell vaguely like burning rubber or give off a sickly sweetness. It’s like nothing she has ever smelled in her lifetime.

“I literally hold my breath when shampooing my hair, and laundry is a terrible experience. Even fresh-cut grass is terrible,” said Ms. Marple, a former corporate banker.

— Read more about post-Covid parosmia in Distorted, Bizarre Food Smells Haunt Covid Survivors at The New York Times.