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. 2020 Sep 22;22(9):e19923. doi: 10.2196/19923

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©Huyen Dang, Sang Dao, Emily Carnahan, Nami Kawakyu, Hong Duong, Trung Nguyen, Doan Nguyen, Linh Nguyen, Maya Rivera, Tuan Ngo, Laurie Werner, Nga Nguyen. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 22.09.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Timeline of the electronic immunization registry introduction and scale-up in Vietnam. MOH: Ministry of Health; NIIS: National Immunization Information System.