Novartis Vaccines and Diagnostics, Emeryville, CA 94608, USA. ling-1.wang@novartis.com|Novartis Vaccines and Diagnostics, Emeryville, CA 94608, USA. ling-1.wang@novartis.com|Novartis Vaccines and Diagnostics, Emeryville, CA 94608, USA. ling-1.wang@novartis.com|Novartis Vaccines and Diagnostics, Emeryville, CA 94608, USA. ling-1.wang@novartis.com