As stated previously2, vaccinating HCW would go against the principle of autonomy and restrict the right of HCW in the context that a public health intervention should be proportional to the available evidence on benefits of vaccinating. In this case, it does not seem justified since there is not available a highly effective seasonal flu vaccine3 and grade A evidence about the effectiveness of influenza vaccination among HCW preventing flu morbidity and mortality in patients is nonexistent4. Besides, vaccinating against influenza it is not a universal recommendation and infection has other ways to reach patients, since coverage does not confer herd immunity. Moreover, the unpredictability of their efficacy (there is not always a good match between circulating and vaccine virus strains) must be acknowledged.
http://www.bmj.com/content/344/bmj.e2217/rr/580256