Read more: Go to page 5 onward. ““We identified a statistically significant increased risk of noninfluenza respiratory virus infection amongTIV recipients (Table 3), including significant increases in the risk of rhinovirus and coxsackie/echovirus infection. Being protected against influenza, TIV (vaccine) recipients may lack temporary non-specific immunity that protected against other respiratory viruses.
Dr. Paul G. King also hotlinks the two studies in his footnotes. This is particularly strategically critical to the healthcare workers dilemma. If a healthcare worker is forced to get the flu shot, he/she is more (emphasis added) vulnerable to the pneumonia virus, for example and other virus that may then infect the patients.