I think what happens is that the virus stimulates the immune system, and inflammatory cytokines are then released in mass.
This process was explained during the H1N1 vaccine controversy last year. On a YouTube video....by Dr. Blaylock.
there is a multiple part video series that explain virus inflammation.
In essence it is called a cytokine storm. Dr. Blaylock explains in that video that the 1917 Pandemic caused so many deaths, because that virus also caused a cytokine storm in some patients. The cytokine storm is hard to treat and when it attacks the lungs causes an inflammatory pneumonia.
Some people get cytokine reactions from flu vaccines and others as well. This is the explanation for the development of illness following the vaccines. It is not the dead virus making people ill, but the reactions to the adjuvants used.
Fish oil, or krill oil, and antioxidants, like grape seed extract reduce internal inflammation. But I think we have all had viruses, that attack the neck or back. My grandmother used to call it "a cold in the neck, etc" .
The LymeRx vaccines caused an autoimmune arthritis too... that is why they were taken off the market. Evidently there is a biomarker blood test for the antigen that causes some people to develop this in response to vaccines.
Dr. Blaylock's videos are really informative...I think you will appreciate them!