I phoned in sick on Tuesday, with my tonsils pretending to be golf-balls. By yesterday night, they were down so I thought "Yes, I can cope with work. I'll go into work tomorrow". Set the alarm for 6am this morning. It went off, I got up had my shower, etc, sat down with my breakfast coffee and realised that I felt more tired than I did when I went to bed last night. Breathing was harder, too. So I phoned the office and told my team that I won't be in for the rest of the week.
I do hope this damn thing isn't escalating.
PS: Yes, I've had my flu jab. I've been having flu jabs