South African mutant virus | Xu Shuchang: Vaccine antibody levels dropped by 7 to 90%, appealing to citizens for injections to reduce mutants

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Written by: Zheng Cuibi

2021-04-20 19:00

Last update date: 2021-04-20 23:25

The South African variant virus hit Hong Kong, and many people are worried about the effectiveness of the new crown vaccine. Xu Shuchang, Chairman of the New Discovery and Animal Infectious Diseases Scientific Committee of the Center for Health Protection of the Department of Health, said today (20th) that a study by mainland scholars showed that Kexing Vaccine is useful for " The neutralizing antibody level of the South African mutant virus will drop by 70% compared to the non-mutant virus. Another study pointed out that the antibody level of BioNTech's Forbitux vaccine against the South African mutant virus also dropped by 90%. .

However, Xu Shuchang said that the two data cannot be directly compared due to the different subjects of the two studies.

He also emphasized that every time there is a major outbreak in the community, the virus is prone to mutate, "there will be one or two virus variants."

Therefore, citizens should be vaccinated as soon as possible to prevent major outbreaks in the community and reduce the chance of virus mutation.

Xu Shuchang said at the meeting that a latest study done by mainland scholars showed that the protection of the Coxing vaccine against the South African variant virus will decrease.

(Information Picture/Photographed by Li Zetong)

Coxing meets South Africa variant antibody drops by 70%, Fubitai drops by 90%: different subjects are difficult to directly compare

The Department of Health today held a media briefing on the effectiveness and safety monitoring of the new crown vaccine.

Xu Shuchang said at the meeting that a new study conducted by mainland scholars showed that the protection of the Coxing vaccine against the South African variant virus will decrease.

He explained that the study found 25 people who had completed two doses of Kexing vaccine two to three weeks ago and took blood to test their antibody levels. It was found that the vaccine's antibody level against the South African variant virus was only 30%.

In another study, the antibody level of Fubitai vaccine against the South African variant virus also plummeted by 90%.

However, Xu Shuchang said that due to the different subjects of the two studies, the two data cannot be directly compared, and the two studies lacked a control group for comparison, and the effectiveness of the vaccine was not known.

▼See the details of the scheduled vaccination and side effects of Kexing and BioNTech in the three pictures▼

The public should be vaccinated to reduce the chance of virus mutation

Xu Shuchang also emphasized that every time there is a major outbreak in the community, the virus is prone to mutate, "there will be one or two virus variants."

Therefore, citizens should be vaccinated as soon as possible to prevent major outbreaks in the community and reduce the chance of virus mutation.

As for the British variant virus, a study by mainland scholars found that the antibody level of the Coxing vaccine has dropped by 50%.

Xu Shuchang said that recent studies in Brazil indicate that Kexing vaccine can neutralize the Brazilian variant virus, but the specific data has not been released.

He expects that Kexing has handed over the data to the WHO, and believes that the WHO can complete the assessment by the end of this month.

The Fubitai vaccine has proven to be more than 85% effective against the British variant virus; for the Brazilian variant virus, its effective rate is closer to 95%.

Scientific committee discusses vaccination arrangements for pregnant women on Thursday

On the other hand, Xu Shuchang cited research as saying that the transmission power of the British variant virus will increase by 36 to 75%, and it may also increase the risk of hospitalization and deterioration; as for the transmission power of the South African variant virus, it may increase by 1.5 times, which may increase the recovery of people. Re-infection; the Brazilian variant virus will also increase transmission and has caused a second infection.

He pointed out that if the variant virus unfortunately spreads in Hong Kong, it will push up the hospital admission rate, the survivors will be infected again, and the effectiveness of the vaccine will also be affected.

He added that pregnant women and breastfeeding women can also be vaccinated with the new crown vaccine, which can produce good antibodies to protect the fetus. The joint scientific committee will meet on Thursday to discuss vaccination recommendations for pregnant women, which are expected to be announced that night.

▼On March 22, the chief executive, director of the department, members of the guild and members of the legislative council received the second dose of Kexing vaccine▼

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The number of adverse events is less than expected for stroke and myocardial infarction is lower than in the past 3 years

According to Zhang Delin, chief medical and health statistician of the Hospital Authority, among the nearly 720,000 people in Hong Kong who have been vaccinated against the new crown, 56 people have suffered from acute strokes, and another 26 people have suffered from acute myocardial infarction, but the ratio is relatively unvaccinated. Still low.

According to the overall adverse events of the population in the past 3 years, the HA has multiplied the number of vaccinated populations to calculate the expected number of adverse events, and calculated the "Actual to Expected Ratio" (O/E ratio), and found the ratio of all adverse events Both are lower than 1, that is, the actual number is less than the expected number.

Zhang Delin said that even for the older group, the O/E ratio was lower than 1, reflecting that the number of adverse events after vaccination was still less than expected, but he could not provide figures for different age groups.

However, he said that between March 22 and April 18 this year, public hospitals had an average of 108.7 inpatients and 18 accident and emergency department deaths every day; 3.6 inpatients had strokes and 2.5 inpatients had acute myocardial deaths every day. Death due to infarction, these figures are relatively low compared to the same period in the past three years.

The Social Medicine Consultant of the Centre for Health Protection of the Department of Health (Specialty) Lian Weici said that the department, together with medical organizations and the Hong Kong Federation of Medical Organizations, issued guidelines on clinical evaluation of vaccination, which will target cancer; anemia and anticoagulation in the future. Update the online guidelines for blood medicine and other hematology-related diseases and other immune system suppression.

She added that about 30 cases were found in general outpatient clinics within 6 weeks, and injections were not appropriate due to sensitive reactions.

▼“New Way to Fight the Epidemic” Maintain social distancing measures for two weeks▼

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Both Indian males in the same class were infected with the South African variant Zhang Zhujun: the transmission route was the S-shaped hook

Xu Shuchang fingered that the Indian male brought the South African mutant virus strain to solve the problem of the variant before pushing the travel bubble

Indian male with South African variant virus quarantined living in Ramada Hotel, same-level African American diagnosed

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