Sometimes they come back--the return of influenza.

Cite this paper

@article{Cornaglia2011SometimesTC, title={Sometimes they come back--the return of influenza.}, author={Giuseppe Cornaglia and Didier Raoult}, journal={Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases}, year={2011}, volume={17 5}, pages={647-8} }