Apparently this virus does not come with sinus//nasal symptoms. So, if one gets mildly sick with sinus issues - it’s probably a cold.
Actually, that’s not true.
The first German case thought he had a cold. Sniffly, sneezing, sore throat...
That is false. It does have nasal and sinus issues.
Colds are upper respiratory. Nose, sinus, throat.
Covid and influenza are lung disease, deep in the chest. You will feel short of breath.