It’s much less likely to experience the loss of smell or taste when infected with Omicron compared to the Delta variant, but it is still possible. The UK Health Security Agency found that loss of taste or smell occurred in about 13% of Omicron cases, compared to 34% of those infected with Delta. Taking a rapid antigen test when symptomatic can help you get treated for an infection sooner than otherwise, and reduces the likelihood that you will unknowingly pass on COVID-19.