A. Influenza (Flu) and COVID-19 both contagious respiratory illnesses, but they are caused by different viruses. COVID-19 is caused by infection with a new coronavirus (called SARS-CoV-2). Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment. Older people and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness. On the other hand flu is caused by infection with influenza viruses. Symptoms can be mild to severe. The most common symptoms include: high fever, runny nose, sore throat, muscle and joint pain, headache, coughing, and feeling tired. These symptoms typically begin two days after exposure to the virusand most last less than a week. The cough, however, may last for more than two weeks. In children, there may be diarrhoea and vomiting, but these are not common in adults. Diarrhoea and vomiting occur more commonly in gastroenteritis, which is an unrelated disease and sometimes inaccurately referred to as "stomach flu" or the "24-hour flu". Complications of influenza may include viral pneumonia, secondary bacterial pneumonia, sinus infections, and worsening of previous health problems such as asthma or heart failure. Because some of the symptoms of flu and COVID-19 are similar, it may be hard to tell the difference between them based on symptoms alone, and testing maybe needed to help confirm a diagnosis. Flu and COVID-19 share many characteristics, but there are some key differences between the two. (Source: https://www.cdc.gov/coronavirus/2019-ncov/symptoms.html) 1. What kind of text type?
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