I'm fairly confident I've shaken the virus off now. I know because I started itching all over yesterday and all the little red spots have appeared on my skin. In other words I overdosed on high salicylate food - probably because I've been indulging in white wine again over the weekend following two days of drinking redbush tea.
As other people have tended to linger for a couple of weeks and develop hacking coughs this suggests that either a) it was not a very dangerous virus at all or
b) that I've shaken it off in record time and that there continues to be a plus side to having a hyperactive immune system.