I sat in a car for ~2 hours today with somebody who was coughing semi-regularly. The windows were closed most of the time. They later told me that their throat felt ticklish.

I'll resolve onset of any of the following symptoms by 11:59:59PM on Christmas Day (Western Christmas, not Orthodox Christmas) as YES:
- Sore throat
- Headache
- Fever
- Persistent Cough

as long as they are not caused by some acute physical irritation, e.g. breathing in dust.