Loss of taste is reported in 2% of cases and loss of smell in 13% of cases 12 weeks after infection. 
People may also experience changes in taste or smell or phantom tastes or smells.
These symptoms typically improve with time. Experience with other viruses shows that, in a small proportion of cases, the loss of taste or smell can last for several years. Changes in taste or smell are usually an indicator of reasonable potential for a full recovery. The evaluation of taste and smell is generally unreliable and those affected by it find the symptoms difficult to describe. After a discussion with your paediatrician, primary care physician or an ear, nose and throat specialist the underlying cause and severity of symptoms can be assessed.

How is it treated ? 

Olfactory training is the recommended treatment for loss of taste and smell as a way of retraining the brain to recognize scents. You can use household products or essential oils: you smell four to six scents (e.g. cloves, lemongrass, roses, eucalyptus, coffee and peppermint) for 15 seconds twice a day. Try to take the time to focus on these rehabilitation exercises; it requires some discipline and regular practice. It is recommended that you consult an ear, nose and throat specialist if symptoms persist beyond 3 months. Vasoconstrictor or local steroid sprays are not indicated unless required by other symptoms.