Sputnik V vaccine packaging is conducted at the Company for Vaccine and Biological Production No.1 (VABIOTECH) in Hanoi. (Photo: VNP/VNA)

Glass vials for the vaccine are dried, washed and put into a rotating chain to remove all impurities before packaging. (Photo: VNP/VNA)

The process of injecting Sputnik V vaccine into the vials is fully automated. (Photo: VNP/VNA)

The first samples taken from this batch will be transported to the Gamaleya Center, the Russian research institute that develops the Sputnik V vaccine, for quality control. (Photo: VNP/VNA)

The vaccines manufactured in Vietnam will be used in the country's National Expanded Programme for Immunisation, as it is dealing with a severe fourth wave of infections while the vaccine supply is still limited. (Photo: VNP/VNA)

Sputnik V vaccine, which enjoys the title of the world's first COVID-19 vaccine to be approved for use, was given conditional authorisation in Vietnam on March 23, following AstraZeneca. (Photo: VNP/VNA)

Sputnik V is one of the COVID-19 vaccines that have a publicly available price (less than 10 USD a jab), and also can be stored at standard refrigerator temperatures (2-8 degrees Celsius) without the need for ultra cold chain storage. (Photo: VNP/VNA)

The vaccine makes use of heterogeneous boosting, meaning that it employs two different vectors for the two shots in a course of vaccination, which the developer claims to provide longer immunity than the ones that use the same delivery mechanism. (Photo: VNP/VNA)

The vaccine employs two different vectors for the two shots in a course of vaccination. (Photo: VNP/VNA)

Vials of Sputnik V vaccine can be stored at standard refrigerator temperatures (2-8 degrees Celsius) without the need for ultra cold chain storage. (Photo: VNP/VNA)

Each set of Sputnik V vaccine includes five 5ml vaccine vials, equivalent to 50 doses. (Photo: VNP/VNA)

Sputnik V vaccine sets. (Photo: VNP/VNA)

Cold storage for vaccines of the Company for Vaccine and Biological Production No.1 (VABIOTECH) (Photo: VNP/VNA)