So, the plot thickens!
I must ask my doctor next visit if he is aware of it.
another symptom that I had was a problem with my left jaw joint. Eating on that side would result in sharp pains to the neck and shoulder.
Doctor suggested it was referred pain from a tooth.
Dentist suggested a tooth infection, and found a mildly suspicious tooth in the area, and prescribed antibiotics.
Chiropractor suggested a strain from severe coughing.
Physio agreed with this one, then suggested viral arthritis.
Pains gradually eased after 3-4 weeks, and disappeared about the same time that the respiratory virus stopped.
So I am thinking that the jaw problem was also viral arthritis.
Just thought as well that my lower back has been constantly sore for this same time, whereas usually it gets better.
Might be another v.a. symptom.