If you have studied this symptom in December, you have come to know it

A woman sitting at the table using a laptop

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The idea that many COVID cases are asymptomatic has led many of us to hold on to the hope that we have already conquered the novel coronovirus. This is a convenient principle, because if true, you can develop antibodies and assure yourself that the virus is no match for you. Now, a new study is giving even more hope to many Americans. Researchers at UCLA found evidence that the virus could have started in the US as early as late December, based exclusively on the rise of a common COVID symptom at the time: cough. New study, published in Medical Internet Research JournalThe week of 22 December saw a significant increase in health clinic and hospital visits for patients reporting respiratory symptoms and continued until February. Researchers examined data from three hospitals and 180 clinics within the UCLA health system and found that patients who sought medical care because of coughing exceeded the predicted level of 95 percent in those months.

A man is sitting on the couch: a man with cough symptoms

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Man with cough

The researchers compared the number of patients reporting cough with the average of five previous sessions. Per 1,000 visits, they found that outpatient offices had two more cough-related seizures than usual. Meanwhile, emergency departments saw 19 more visits than normal and hospitals with acute respiratory failure saw 39 more visits on average. These numbers indicate that there is a statistically significant increase in patients experiencing respiratory symptoms in California from February to December. Related: For more information, sign up for our daily newspaper.

According to a study conducted in January, COVID is the most commonly accepted timeline in December in China the Lancet, And traveled to the rest of the world the following month. Nevertheless, there are other studies that support the idea that the virus was circulating long ago. A study in International Journal of Antimicrobial Agents Reports that there was a patient in France with COVID in late December, and another study published Infection, genetics, and development The note that COVID began airing sometime between 6 October and 11 December. COVID was around the beginning of 22 December, completely replacing the current Centers for Disease Control and Prevention (CDC) timeline. According to the CDC, the first COVID case was from a resident of Oregon, who returned from a trip to Wuhan and reported symptoms at a clinic on 19 January. The New England Journal of MedicineHowever, it is almost impossible to be sure that if you had COVID in December, this recent study makes a convincing argument that people with a cough could quickly catch the epidemic virus at the end of 2019. For more symptoms, the patient cannot move, check the 98 longest lasting symptoms that you need to know about.

Gallery: 7 hints you just added COVID (ETNT Health)

A woman using a laptop computer: Other symptoms reported in the survey include muscle pain, chills, fatigue, and headaches.  In addition, at least half of the patients reported a minimal stomach problem - the most common diarrhea - but also GI symptoms such as abdominal pain, nausea and vomiting.  Loss of smell or taste was also common among those infected with the virus, who did not have to go to the hospital.  (Note on the fine print: CDC has compiled its information through a survey of 164 people with confirmed cases of COVID-19 between January 14 and April 4)

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