As of January 2022 COMMON COLD MAY MOST PROBABLY BE COVID!
Omicron getting the most frequent mutation responsible for Covid diseases has made that more than 50% of the patients with a mild flu are Covid positive. So make sure to test yourself if you’ve got common cold symptoms as passing the disease gives you a QR code providing freedom of mobility. Here you’ll find a list of symptoms which we actually find with most Covid patients now.
Night sweat and lack of appetite might be symptoms more specific for COVID with Omicron. Diagram is taken from Dr. John Campbell: