US NIH grantUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) - USA [R01AI121989]; Scholarship Council of China [201308430250]; NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASESUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH National Institute of Allergy & Infectious Diseases (NIAID) [R01AI121989, R01AI121989, R01AI121989, R01AI121989] Funding Source: NIH RePORTER