I was on a residential course two weeks ago. COVID ripped through the class, knocking out 11 of the 16 participants. Symptoms ranged from an uncontrollable 3-day headache, fatigue, barking cough, exhaustion for a number of them (all symptoms each), to a mild sore throat for one of them. All of them were unable to work for a week (apart from the mild throat one who WFH anyway), so several of them lost money due to self employment. Several tested negative for the first few days until around day 3 or 4, although a few showed immediately. As I was in contact with most of them on the group chat, I can say that very few of them thought they had a bad cold. It really was something else. Ditto for a friend who had the razor throat variant, and for my own partner who was horribly unwell with it for a week recently. Bizarrely, I managed to not catch it both times, which as an asthmatic I'm infinitely grateful for. Like a common cold it definitely was not.