Losing your sense of smell often much better predictor of Covid than cough or fever

From Scence Daily News comes reports that temporarily losing your sense of smell is often the first sign of a Covid infection.  This is called "anosmia".  It's not the smell nerve cells but the underlying support cells that are infected.  Anosmia is not as common as cough and fever but when you have it, it's a stronger clue.  Since it shows up before the other symptoms, it gives you lead time for a doctor to consider prescribing hydroxyquinone.

A majority of COVID-19 patients experience some level of anosmia, most often temporary, according to emerging data. Analyses of electronic health records indicate that COVID-19 patients are 27 times more likely to have smell loss but are only around 2.2 to 2.6 times more likely to have fever, cough or respiratory difficulty, compared to patients without COVID-19.