Prof John Wilson, president-elect of the Royal Australasian College of Physicians and a respiratory physician says almost all serious consequences of Covid-19 feature pneumonia.
Wilson says people who catch Covid-19 can be placed into four broad categories.The least serious are those people who are “sub-clinical” and who have the virus but have no symptoms.
Next are those who get an infection in the upper respiratory tract, which, Wilson says, “means a person has a fever and a cough and maybe milder symptoms like headache or conjunctivitis”.
He says: “Those people with minor symptoms are still able to transmit the virus but may not be aware of it.”
The largest group of those who would be positive for Covid-19, and the people most likely to present to hospitals and surgeries, are those who develop the same flu-like symptoms that would usually keep them off work.
A fourth group, Wilson says, will develop severe illness that features pneumonia.
He says: “In Wuhan, it worked out that from those who had tested positive and had sought medical help, roughly 6% had a severe illness.”
The WHO says the elderly and people with underlying problems like high blood pressure, heart and lung problems or diabetes, are more likely to develop serious illness.
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