Abstract
Emerging Microbes & Infections (2017) 6, e8; doi:10.1038/emi.2017.1; published online 15 February 2017
Acknowledgements
The work was supported in part by NIH Grant AI099512 and Major Project of the Twelfth Five-Year Plan (2013ZX10003008-003 and 2013ZX10003001-002).