How to distinguish between cold, flu and Covid?

from CNN.com

https://www.cnn.com/2021/12/28/health/is-it-cold-flu-or-covid-wellness/index.html

Early signs of cold, flu and Covid-19 tend to be similar, El-Sayed said (Detroit Health Department executive director).

 

Both Covid-19 and the flu often cause symptoms such as fever, fatigue, body aches, sore throat, shortness of breath and vomiting or diarrhea, according to the US Centers for Disease Control and Prevention.

 

Covid-19 infection can be distinguished, however, by the headache and dry cough that often go along with it. The loss of taste and smell that has been the biggest warning sign of a Covid-19 infection is still a possible symptom, though it is less prevalent now than it has been with other variants, El-Sayed said.

"For people who are feeling serious chest pain, particularly with a dry cough that has gotten worse, that's when you really ought to seek medical attention," he warned.