A sudden loss of smell and taste could be a sign of mild coronavirus disease.
Covid-19 symptoms include fever, dry cough, tiredness, shortness of breath or difficulty breathing.
Those with a sudden loss of smell must home-quarantine and get tested for coronavirus disease.
Very few conditions lead to sudden amnosia, or the loss of smell and taste.
It should be treated as a sign of coronavirus disease, especially by people who risk exposure at the frontlines, such as health workers.
People with a sudden loss of smell are 10 times more likely to have Covid-19 than any other infection, according to a study by the University of California in San Diego.
The effect was temporary and patients recovered taste and smell within a few weeks of infection.
