The anonymous volunteers, including two 20-year-old students and a 40-year-old teacher, were vaccinated on Thursday morning at Vietnam Military Medical University in Hanoi as Vietnam officially began human trials of the vaccine developed by Nanogen Pharmaceutical Biotechnology JSC. After 72 hours, they were in stable condition, with no abnormal signs detected, the Health Ministry said Sunday. The trio will return home and be monitored by medical staff.

Vietnam Military Medical Academy is scheduled to administer the vaccine to the remaining 57 volunteers who had registered for the first phase trial on Monday.

The human trial of Nanocovax would pass through three phases. The second phase is scheduled to start within February next year, involving up to 600 volunteers, while the third phase is expected to see participation of up to 30,000 volunteers.

Three-phase human trials of the first made-in-Vietnam COVID-19 vaccine is scheduled to complete in February 2022.