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.......Difference between cold, flu and COVID-19
A cold is a symptom that infects the upper respiratory tract such as the nose and throat by a virus, and symptoms appear quickly 1-3 days after exposure.
Symptoms include cough, sneezing, stuffy nose, runny nose, sore throat, low fever, headache, and muscle pain.
Influenza is an epidemic caused by influenza virus, and it is difficult to carry out daily life due to severe body aches and is active from late autumn to early spring.
It is an acute febrile respiratory disease in which systemic symptoms such as fever, headache, muscle pain, fatigue, and respiratory symptoms such as cough and sore throat suddenly begin after an incubation period
The COVID-19 virus is a respiratory disease caused by infection with the coronavirus. At first, it shows mild symptoms and then progresses slowly. The symptoms are similar to those of a cold, but the difference from a cold is that it mainly affects the lower respiratory tract such as the lungs.