Acknowledgments
We thank the study participants and their families, the study staff, and the laboratory staff from the Pasteur Institute of Ho Chi Minh City, the Murdoch Children's Research Institute Translational Microbiology Group, the Murdoch Children's Research Institute New Vaccines Immunology team, and the Menzies Child Health team. We acknowledge the contributions of Nguyen Thi Kieu Chinh, Lam Trung Duc, Keith Klugman, Gail Rodgers, and Lay Myint Yoshida. We also acknowledge the Victorian Government's Operational Infrastructure Support Program. This work was supported by the Bill & Melinda Gates Foundation (grant number INV-008627).