There is no mention on the Enterovirus Foundation website that complement fixation is suitable for testing the chronic enterovirus infections in ME/CFS patients.
And especially surprised to see lots of high coxsackievirus A titers.
I did not know Dr Chia also uses Cambridge Biomedical for enterovirus testing. Do they perform the same type of enterovirus tests as ARUP Lab? And are they any cheaper, would you know? I would like to take the ARUP tests for coxsackievirus B and echovirus, but at $500 each, that is a little bit too much money to pay out of pocket, especially as the results will not be of any particular help to me.