https://dailycoffeenews.com/2020/12/14/coffee-is-being-widely-used-as-a-covid-19-diagnostic-tool/

“Loss of smell is very specific to COVID-19, but not everyone with SARS-CoV-2 infection reports smell loss,” they wrote. “Critically, being able to smell things does not mean you are COVID-free. If you were able to smell your coffee this morning, that is an ambiguous result: It might mean you don’t have COVID-19, but it could also mean that you are infected with SARS-CoV-2 and simply didn’t lose your normal sense of smell.”