Characteristics of participants who developed IgG antibody
| Age range, years | Gender | Ethnicity | Region | Occupation | History of travel to a high-risk area | History of contact to a confirmed case | Symptoms | Previous PCR status | |
| Participant A | 56–60 | Female | Thai | Central | HCW | No | No | Sore throat | Never tested |
| Participant B | 41–45 | Female | Thai | Central | Patient | No | No | No | Negative |
Age range was used for participant’s privacy and confidentiality.
HCW, healthcare worker.