More information about text formats
This is a useful study. The participants may not be aware that viruses like cytomegalovirus (CMV) interfere with both influenza vaccination and the immune response to influenza infection especially in the elderly. There is also some evidence that influenza may be interacting with outbreaks of an unknown agent (perhaps CMV?). See relevant references in the sections dealing with deaths and medical admissions and roles for CMV in human health at http://www.hcaf.biz/2010/Publications_Full.pdf
I hope this is helpful to the study.