4,032
Participants
Start Date
March 13, 2022
Primary Completion Date
June 5, 2022
Study Completion Date
November 13, 2022
SARS-CoV-2 IgG Antibody testing
IgG Antibody testing for previous exposure to SARS-CoV-2
Vietnam National Children's Hospital, Hanoi
National Children's Hospital, Vietnam
OTHER