Dr. Chalermchai summarized 5 points: The new 2-strain COVID vaccine stimulates immunity better than the first vaccine, but not much, indicating that the maximum efficiency is only 56% in young people. The farther from the needle, the better the results . and a new second generation vaccine It did not provide high efficacy at the level of 70-95% as when producing the first vaccine, the first generation to deal with the Wuhan virus.
Today (December 5th), Dr. Chalermchai Boonyaleephan posted a private blockdit “one hundred and eight thousand and nine with Dr. Chalermchai” about the new vaccine, stating that he is disappointed!! Both brands of new bi-strain vaccines using mRNA technology weren’t as good as expected. It is well known that the coronavirus that causes COVID-19 mutates in sequence. from the Wuhan virus strain
And in the following 11 months, many countries were able to develop a vaccine against COVID. using the Wuhan virus as a starting point AND it works very well, with an efficacy level of 70 to 95%. Therefore, there are many rapid mutations. Speaking only of the main strains, VOC: Variant of Concern will have alpha, beta, gamma, delta and omikron. it has not been able to accelerate research and development to keep pace with the above species
Until the year 2022, Omicron virus was the main species that can stand for a year thus giving scientists long enough time to successfully develop a second generation 2-strain vaccine by combining the Wuhan strain with the subspecies Omicron strain BA.4/5, which in the US It was introduced a few months ago and the USCDC collected data between September 14 and November 11, 2022 on 360,000 vaccine recipients. It is mRNA technology (mRNA), two famous brands and injected for people who have previously vaccinated some kind of old type of vaccine. Whether two needles, three needles or four needles found interesting numbers that The further he is injected from the original vaccine, the more he will only get more immunity and injections in young people will get higher immunity than injections in the elderly
The numbers are that if injected 2-3 months after the original vaccine, the effectiveness will increase by 28-31% compared to not vaccinating the new version. But if the new booster vaccine is given more than 8 months apart, the effectiveness increases to 43-56%.
43% over 65 years old
48% in people aged 50-64
56% between 18-49 years old
In short
1. A new so-called second generation bi-strain vaccine consists of the Wuhan virus strain and the Omikron virus strain. Subspecies BA.4/5
2. The booster efficacy of the second generation bi-strain vaccine was slightly better than the first generation vaccine.
3. This second generation booster vaccination If injected 8 months after the original object, it will achieve better results than the injection 2-3 months later.
4. Immunity will be higher by vaccination in people aged 18 to 49 than in people aged 50 and over, and
5. New second generation vaccines It did not provide high efficacy at the level of 70-95% as when producing the first vaccine, the first generation to deal with the Wuhan virus.
