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New British study identifies 6 different types of COVID-19

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A new study of COVID-19, based on data from a symptom tracker app, determined that there are six distinct "types" of the disease involving different clusters of symptoms. The discovery could potentially open new possibilities for how doctors can better treat individual patients and predict what level of hospital care they would need.

Researchers from King's College London studied data from approximately 1,600 U.K. and U.S. patients who regularly logged their symptoms in the COVID Symptom Tracker App in March and April.

Typically, doctors will look for key symptoms such as cough, fever and loss of the sense of smell to detect COVID-19. The study, which has not been peer-reviewed, says the six different "types" of COVID-19 can vary by severity and come with their own set of symptoms....

The six clusters of symptoms outlined in the study are:

Flu-like with no fever: Headache, loss of smell, muscle pains, cough, sore throat, chest pain, no fever.Flu-like with fever: Headache, loss of smell, cough, sore throat, hoarseness, fever, loss of appetite.Gastrointestinal: Headache, loss of smell, loss of appetite, diarrhea, sore throat, chest pain, no cough.Severe level one, fatigue: Headache, loss of smell, cough, fever, hoarseness, chest pain, fatigue.Severe level two, confusion: Headache, loss of smell, loss of appetite, cough, fever, hoarseness, sore throat, chest pain, fatigue, confusion, muscle pain.Severe level three, abdominal and respiratory: Headache, loss of smell, loss of appetite, cough, fever, hoarseness, sore throat, chest pain, fatigue, confusion, muscle pain, shortness of breath, diarrhea, abdominal pain.

The first level, "flu-like with no fever," is associated with headaches, loss of smell, muscle pains, cough, sore throat and chest pain. Patients at this level have a 1.5% chance of needing breathing support such as oxygen or a ventilator.

The second type, "flu-like with fever," includes symptoms like loss of appetite, headache, loss of smell, cough, sore throat, hoarseness and fever. Researchers say about 4.4% of patients at this level needed breathing support.

Patients with the third type, simply described as "gastrointestinal," do not have a cough as part of their illness. Instead, they experience headache, diarrhea, loss of smell, loss of appetite, sore throat and chest pain, and about 3.3% needed breathing support....

In type four, or "severe level one," patients experience fatigue along with headache, loss of smell, cough, fever, hoarseness and chest pain. Patients at this level needed breathing support at a rate of 8.6%.

Type five, "severe level two," includes the symptoms of type four along with loss of appetite, sore throat and muscle pain, and is mainly distinguished by confusion....Almost 10% of patients at that level need breathing support.

The most severe type of COVID-19 is referred to as "severe level three, abdominal and respiratory," and has all the above symptoms along with abdominal pain, shortness of breath and diarrhea. Nearly 20% of these patients need breathing support.

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