Both patients, one in Hanoi capital and the other in Bac Ninh province, are identified as F1 cases, i.e. having close contact with COVID-19 patients.
Hanoi has recorded 30 new community cases since the virus recurred in Vietnam late last month.
The capital has tightened measures to slow the spread of the virus, including a lockdown imposed on several areas throughout the capital.
Overall, as many as 555 virus carriers have been confirmed in 13 cities and provinces across the country since the latest wave of the coronavirus erupted late last month.
Hai Duong province, a gateway to Hanoi capital, remains the country’s biggest coronavirus hotspot, registering more than half of the total number.
Currently, nearly 130,000 people who came into contact with COVID-19 patients or returned from epidemic hit countries have been placed in quarantine for medical surveillance.
Vietnamese people are celebrating a 7-day long lunar New Year break. The Ministry of Health has encouraged people to strictly follow medical recommendations, including wearing face masks and avoiding large gatherings, in an effort to bring the fresh outbreak under control.