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When will my smell sense return? My PCR of covid19 was positive and I lost my sense of smell before 3 days. Jeff Diver · 15m ago retired reference assistant at Cornell University Library Haidar, First, some good news “…in most cases, SARS-CoV-2 infection is  unlikely to  permanently  damage olfactory neural circuits and lead to persistent anosmia , …, a condition that is associated with a variety of mental and social health issues, particularly depression and anxiety.” [1] Now, the bad.  Patience, however, will be required . A cursory survey of similar questions on Quora and on the web indicates that most patients regain their sense of smell or at least notice some improvement within 4 weeks of initial symptoms. [2] “ So why does smell not return in some cases?  This is more theoretical but follows from what we know about inflammation in other systems. Inflammation is the body’s response to damage and results in the release of chemicals that destroy the tissues ...

How likely is it that COVID could have disastrous long-term health effects?     Jeff Diver · 9h ago retired reference assistant at Cornell University Library Sharon, Nobody knows. We’re just guessing. As of September 2020 we have no long-term experience with this disease. “ COVID-19 symptoms can sometimes persist for months . The virus can damage the lungs, heart and brain, which increases the risk of long-term health problems.” [1] “ The list of lingering maladies from COVID-19 is longer and more varied than most doctors could have imagined. Ongoing problems include fatigue, a racing heartbeat, shortness of breath, achy joints, foggy thinking, a persistent loss of sense of smell, and damage to the heart, lungs, kidneys, and brain .” [2] [3] In some populations, long-haul survivors are a significant percentage of total surviving patients. “ Thirty-five percent of patients surveyed by the agency said they still weren't back to their usual good health even two to th...