‘2+1’ proves to be ‘by far’ most effective vaccine strategy

Vaccine boosters have proven effective in building immunity against the Omicron variant’s BA.2 sublineage, according to the Department of Medical Sciences (DoMS).

The study was conducted on volunteers from Siriraj Hospital to monitor their immune response to the BA.1 and BA.2 sublineages of the Covid-19’s Omicron variant, said the DoMS director-general Supakit Sirilak.

Dr Supakit said about 130 million courses of vaccines have been administered to people.

Of them, around 70% were either double-doses or double-doses plus a booster.

Last week, BA.2 accounted for 96% of all Covid-19 infections while BA.1 accounted for the rest.

In the next couple of weeks, BA.2 is expected to completely take over as it spreads faster than BA.1.

The previously dominant Delta strain of the virus has now disappeared.

Dr Supakit said the two-week study revealed double doses plus a…