The XPR1 receptor for Polytropic Murine Retroviruses, (which includes XMRV) have been
located in the heart and other viruses such as the Cocksakie virus can cause heart problems.
This means people with ME/CFS of any age can have heart problems. It isnt worth taking a chance.
Infection of Cardiomyocytes and Induction of Left Ventricle Dysfunction by Neurovirulent Polytropic Murine Retrovirus