Recovered Covid patients lost their sense of smell and taste after contracting the coronavirus, and may not feel recovered for up to five months.
Anosmia, the loss or change of smell and taste, is officially considered a symptom of coronavirus infection.
Data from the National Bureau of Statistics show that half of coronavirus patients have symptoms, and 16% and 17% of them have some form of smell and taste loss respectively.
Researchers at the University of Quebec studied 813 medical staff who signed Covid-19 contracts.
More than one-third (38%) of people who lose their feelings have not fully recovered their taste after five months.
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Recovered Covid patients lost their sense of smell and taste after contracting the coronavirus, and may not feel recovered for up to five months. Loss of smell or changes in smell and taste are formally confirmed as symptoms of coronavirus infection (prototype)
What is insomnia?
Anosmia is the medical name for a disease in which someone completely or partially loses their sense of smell.
The most common causes are temporary or permanent, and are diseases that affect the nose or sinuses, such as polyps growing in the respiratory tract, bone or cartilage fractures, hay fever or tumors.
It is different from hypoosmosis, which is reduced sensitivity to some or all odors.
In the UK, about 3.5 million people are affected by this disease, while in the US, there are nearly 10 million people. This is a surprisingly common phenomenon, affecting 3% to 5% of the population.
Head injuries and neurological diseases such as Parkinson’s or Alzheimer’s can also cause illness by damaging the nerves in the nose responsible for detecting odors.
The study participants all filled out questionnaires and completed home tests to assess their sense of taste and smell.
These experiments were done on average five months after they captured Covid-19, so the researchers could not say whether the duration of insomnia lasted longer than this, because there is currently no data.
Research author Dr. Johannes Frasnelli said: “Although COVID-19 is a new disease, previous studies have shown that most people lose their sense of smell and taste in the early stages of the disease.”
“We want to go further and see how long the loss of smell and taste lasts and how severe it is in COVID-19 patients.”
People classify the sense of smell and taste from 0 to 10, where zero is meaningless at all, and 10 means strong feeling.
The average score of people who recovered from Covid was 8, while the average score of people before the illness was 9.
Of the 813 participants, 527 lost their taste during their first illness.
After five months, 38% of them (200 people) had not recovered their sense of taste.
Dr. Frasnelli said: “Our results indicate that the impaired sense of smell and taste in many COVID-19 patients may persist.”
“This emphasizes the importance of following up with infected persons, and further research is needed to discover the extent of neurological diseases related to COVID-19.”
The study has not been peer-reviewed and will be presented at the 73rd annual meeting of the American Academy of Neurology from April 17 to 22.
The loss of smell and taste was officially confirmed as a symptom of Covid on May 18, 2020, and has since become an integral part of the diagnosis process, as the NHS stated that the only three obvious signs of the disease are fever and cough. Or lose taste and smell.
Researchers at King’s College London (KCL) recently called on policy makers to expand this set of recognized symptoms.
Researchers at the University of Quebec studied 813 medical staff who signed Covid-19 contracts. More than one-third (38%) of people who lose their feelings have not fully recovered their taste (stock) after five months
Prevalence of symptoms in sick Covid-19 patients
Fatigue and weakness -28.11%
Muscle Soreness Myalgia-22.02%
Decrease in taste-17.14%
Shortness of breath -10.48%
Nausea and vomiting-8.79%
Abdominal pain -5.91%
They say that increased fatigue, sore throat, headaches and diarrhea will enable “millions” of unproven cases to be discovered.
The results of a government-led study REACT showed that thousands of infected people are slipping through the cracks due to narrow guidance. Chief Medical Officer Professor Chris Whitty has been under pressure to change the official list of Covid symptoms.
The World Health Organization and US officials recognize other less common symptoms, such as muscle pain and diarrhea.
But the current “test and track” rules mean that cotton swabs in the UK are only suitable for people with fever, persistent cough or loss of smell or taste.
Professor Tim Spector, the chief scientist of the Zoe app and an epidemiologist at King’s College London, said: “From the beginning, we knew that testing for the classic triad of cough, fever and insomnia would miss a large number of positive cases.
“We discovered the symptoms of anorexia as early as May, and our work led the government to include it on the list; it is now clear that we need to add more.
“By inviting any user who recorded any new symptoms for testing, we confirmed that Covid has more symptoms.”
A group of 140 family doctors in London responded to this view and called on health officials to expand the number of recognized symptoms.
They said that many patients with milder signs did not even consider that they might be infected with the virus and did not self-quarantine when the infection was strongest.
The doctor added that they must encourage the patient to lie down to perform the examination, which is only suitable for patients with three recognized symptoms.
Extending the program to a runny nose deep in winter may put tremendous pressure on the British “test and track” system.
Top scientists have been warning to expand the official list for several months, after warning that it had not contracted enough infections in the early stages.