Thai Health Ministry Defends its Use of Sinovac Covid-19 Vaccine

Thailand’s public health ministry has defended its use of the Sinovac covid-19 vaccine developed by Chinese company. Dr Supakit Sirilak, chief of the Department of Medical Science said immunity develops two weeks after you have had your shots. “However, the level of immunity differs based on the virus variants.”

Dr Supakit comments come after social media went viral over a mans claims that he received the jab and he hadn’t developed any immunity.  The man claimed he received the state-sponsored jab of Sinovac covid-19 vaccine and had a rapid test which showed he hadn’t developed any immunity at all.

Dr Supakit said anyone wanting to check the efficacy of their jabs should only have their immunity checked by standard laboratory tests.

“I am not surprised to see that the rapid test could not detect the immunity because it couldn’t reach the point where the immunity is found, which is spike protein,” Dr Supakit said.

Furthermore he had had the Chinese vaccine in February and had developed immunity two weeks after the second jab. “It needs to be done under standard laboratory conditions with a proven method,” he added.

Sinovac effective against covid-19 death

Dr Supakit said the Sinovac covid-19 vaccine performs best with a level of immunity at 114 against the original Wuahn strain from China. He said its efficacy drops to less than half that level when measured against the mutated G strain that is now spreading around Thailand.

He also acknowledged that research of Sinovac’s covid-19 vaccine efficacy in Chile showed that the level of immunity increased by 47.8% when tested 14 days after two shots but was as high as 95.6% after 70 days.

Sinovac’s covid-19 vaccine is 67% effective in preventing symptomatic Covid-19 infections and prevents 80% of fatalities, according to a Bloomberg news report this week, citing a Chilean government study published on Friday.

Dr Supakit said the DMS had been monitoring vaccines’ efficacy against Covid-19 variants, with special attention given to variants from South Africa and India.

Meanwhile, Dr Opas Karnkawinpong, chief of the Department of Disease Control, said his staff had found that infections from the latest Thong Lor cluster were predictable and one person could spread the disease to 1.6 people.

That means the number of new infections will be reduced within two weeks if people comply with the government’s measures, including the closure of pubs, a ban on mass gatherings and drinking alcohol in restaurants.

Source: Bangkok Post, Bloomberg