SOURCE:
https://brighamhealthhub.org/are-you-sick-with-covid-19-the-flu-or-a-cold/
https://www.cdc.gov/flu/symptoms/flu-vs-covid19.htm
“While COVID-19, the flu and the common cold share many of the same symptoms, there are usually some differences in how these symptoms appear. For example, cold and COVID-19 symptoms may come on gradually over time, whereas the flu’s onset is usually sudden. A person with the flu develops symptoms 1 to 4 days after infection. A person with COVID-19 typically develops symptoms 5 days after being infected, but symptoms can appear as early as 2 days after infection or as late as 14 days after infection.”
