Most people who were infected early with coronavirus lost their odor. Now not so much. Researchers are beginning to figure out why and what it means in the future.
Loss of odor and taste was a hallmark of the early COVID-19.
Most people infected in 2020 and 2021 lost their odor, no matter how sick coronavirus made them.
That started to change with the delta variant moving into the US last summer and taking over in the fall. Between 15-50% of people infected with delta lost their odor compared to 50% to 80% of those with previous variants, said Danielle Reed, an odor researcher and associate director of the Monell Chemical Senses Center in Philadelphia.