1. Hubert Department of Global Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
2. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA
3. Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA, USA
4. Department of Community Health, Tufts University, Medford, MA, USA
5. Emory Vaccine Center, Emory University, Atlanta, GA, USA