The Scientific Committee under the Centre for Health Protection recently recommended that the interval between the first two doses of the Novel Coronavirus vaccine for people aged 18 to 59 should be extended from the current 3 weeks to 8 weeks.
Lin Yonghe, a member of the Scientific Committee on Vaccine Preventable Diseases, said today (20th) that, according to foreign research, after lengthening the distance between the first and second injections, the immune memory of antibodies and T cells is also better, while the risk of myocarditis and pericarditis is better. Also greatly reduced, the risk of pericarditis can vary by 10 times.
He also pointed out that although the epidemic has rebounded recently, because people aged 18 to 59 are "relatively at ease", and in the long run, the eight-week interval has better antibody protection, so the committee makes relevant recommendations.
▼On May 30, citizens rushed to take the third vaccine to cope with the vaccine pass▼
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Lam Wing-ho said in the RTHK program "Millennium" today that the committee and experts studied the latest data, as well as the decision to adjust the timing and number of injections due to changes in vaccines, and pointed out that the effectiveness and risks involved, and local As the epidemic situation changes, if the epidemic situation is severe, we hope that citizens "complete the second and third injections as soon as possible, and wait for everyone to have strong protection."
WHO, Canada and the US have already adjusted
As for adjusting the interval between the first two doses of the Fubitai vaccine to eight weeks, he cited countries such as the World Health Organization, Canada and the United States that have also adjusted it to a period of eight weeks. Studies have found that after the interval is extended, the neutralizing antibody is three times apart from the first two doses. Zhou ideal; and a Canadian study found that three weeks apart and eight weeks apart, the risk of pericarditis is 10 times worse.
He also mentioned that the WHO had issued relevant guidelines as early as January this year, but the outbreak of the Omicron variant virus started in Hong Kong. However, at that time, many citizens did not get all the shots, so he hoped that the public could speed up the vaccination to improve protection.
It is recommended that citizens refrain from strenuous exercise for one week after the second vaccination three weeks apart
He also emphasized that if the public does not have an urgent need, if they have to go overseas, the protection and risk are better in the long run after an eight-week interval. However, if the public needs to be vaccinated in advance, they can go to the vaccination center and discuss their physical condition with the staff. is suitable, or consult a doctor before making a decision.
As for the citizens who received the second dose three weeks apart earlier, Lin Yonghe emphasized that there is no need to worry, because many countries also have a three-week interval, as long as they do not do strenuous exercise one week after the vaccination, the risk can be greatly reduced: "Most myocarditis is The injection is issued a week after the injection, and the chances are very low after that.”
▼On May 29th, citizens rushed to take the third vaccine on Sunday▼
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Xu Shuchang pointed out that the recommendation for people over 60 years old is not changed because the immune response is relatively weak
Xu Shuchang, a government expert consultant and chair professor of the Department of Respiratory System of the Chinese University, said in the commercial program "Let's Go on a Sunny Day" that the vaccination rates of the first two injections in Hong Kong are 93% and 88% respectively. It is believed that the number of affected people is not large. The government will also adjust the computer system for making vaccination appointments and adjust the requirements for the "vaccination pass" accordingly. The public need not worry too much.
As for people over 60 years old, he believes that their immune response is relatively weak, so they need to be vaccinated earlier, so the vaccination recommendation for them will not be changed for the time being.
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