“Having vaccines is good but not enough”: Requirements for optimal COVID-19 immunization program in Vietnam - Doan, Linh Phuong; Dao, Nam Gia; Nguyen, Duy Cao; Dang, Trang Huyen Thi; Vu, Giang Thu; Nguyen, Long Hoang; Vu, Linh Gia; Le, Huong Thi; Latkin, Carl A.; Ho, Cyrus S. H.; Ho, Roger C. M. (Frontiers in Public Health, 2023)