COVID-19 vaccines approved for use in Vietnam go through three clinical trial phases: ministry

COVID-19 vaccine (Photo: VNA)

Hanoi (VNA) – All types of approved by Vietnam for have gone through , the Health
Ministry has affirmed.

As of June 23, Vietnam has conditionally approved four
vaccines against , namely Comirnaty of Pfizer, A2D1222 of AstraZeneca,
Sputnik-V of Gamalaya, and Vero-Cell of Sinopharm to serve urgent needs of pandemic
prevention and control, the ministry said, adding that Moderna vaccine is also
in the process of being approved.

Following international practice, all vaccines, before being
put into emergency use in Vietnam, must ensure three factors of safety,
immunogenicity and most importantly, protection effectiveness.

All of the above-mentioned vaccines had to go through three
phases of clinical trials, of which the third phase involved from 20,000 to 50,000
participants.

Specifically, the third phase of AstraZeneca’s vaccine was
carried out in 11 countries with 49,626 participants, Vero-Cell vaccine in six
countries with over 45,000 participants, Sputnik-V in five countries with
21,977 participants, Pfizer’s vaccine in six countries with 43,418
participants, and Moderna vaccine in four countries with 30,420 participants,
according to the ministry.

In the context of COVID-19 breaking out worldwide, the
urgent authorisation of a vaccine against the disease is necessary. However, this does
not mean skipping the mandatory clinical trial stages, the ministry added./.