[1] Baylor Coll Med, Texas Childrens Ctr Vaccine Dev, Dept Pediat, Natl Sch Trop Med, Houston, TX 77030 USA
[2] Baylor Coll Med, Texas Childrens Ctr Vaccine Dev, Dept Mol Virol, Natl Sch Trop Med, Houston, TX 77030 USA
[3] Baylor Coll Med, Texas Childrens Ctr Vaccine Dev, Dept Microbiol, Natl Sch Trop Med, Houston, TX 77030 USA
[4] Baylor Univ, Dept Biol, Waco, TX 77030 USA
[5] Texas A&M Univ, Hagler Inst Adv Study, College Stn, TX 77843 USA
[6] Texas A&M Univ, Scowcroft Inst Int Affairs, College Stn, TX 77843 USA
[7] Rice Univ, James A Baker III Inst Publ Policy, Houston, TX 77005 USA