Hanoi continued to lead the way for infections with 2,982 cases, trailed by the central city of Da Nang with 888, and the southcentral coastal province of Khanh Hoa with 680 cases.
The fourth wave to hit Vietnam in late April has until now seen over 2 million COVID-19 cases recorded, whilst more than 1.72 million have since recovered from the virus.
As of January 15, more than 168 million COVID-19 vaccine doses have been administered throughout the country, with over 72.3 million people now fully getting two jabs.
A further 9,326 patients were declared to have recovered from the virus on the day, pushing up to the overall number of recovered patients to 1,727,290 people across the country.
The national COVID-19 death toll now stands at 35,609 after a further 129 fatalities were confirmed over the past 24 hours, approximately 1.8% of total infections, ranking 26th out of 224 countries and territories worldwide.
Vietnam has so far recorded a total of 68 cases infected with the Omicron variant, all imported and quarantined right upon entry. Among the new Omicron infections, 18 came from Ho Chi Minh City.
The Health Ministry has repeatedly warned of the high transmission of the new variant, especially among the unvaccinated, which could lead to an overwhelmed health care system.
The ministry is keeping a close watch on the pandemic progression regarding Omicron, and frequently stay in touch with the WHO to get updates on the variant in order to have a timely response.