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The loss of smell indicates damage to the olfactory nerves, which are responsible for the sense of smell. Although you had recovery after a prolonged period of 4 months from your initial infection, there may have been some permanent damage to the olfactory nerves. I do not know how long or whether you will regain your sense of smell after this second insult. I recommend you try and contact researchers of “long Covid” who may be able to provide you with information or enrollment in studies to help us better understand these significant consequences. Link to resources here.