Blood transfusion

<p>A study found that 4.5% of ME/CFS patients received a blood transfusion just days before developing a flu-like illness that appeared to trigger their ME/CFS.<a href="http://niceguidelines.blogspot.co.uk/2011/07/45-of-mecfs-patients-developed-disease.html" rel="nofollow" target="_blank" >1</a><br />

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This development of ME/CFS immediately after a blood transfusion may well be caused by the patient acquiring an infection from the transfusion, as blood products may contain viruses such as enteroviruses which are linked to triggering ME/CFS.<br />

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Major surgery is also known to sometimes trigger ME/CFS, and since surgery often involves blood transfusion, this may explain why ME/CFS can appear after such major operations.<a href="http://www.investinme.org/Documents/PDFdocuments/CanadianDefinitionME-CFS.pdf" target="_blank" rel="nofollow" >1</a></p>