A study by the Faculty of Medicine of the University of Hong Kong found that if adolescents aged 12 years or older received the first dose of Fubitai three weeks after receiving the second dose, the relative risk was estimated to be about 7 times that of the first dose. The first injection should be at least three months apart to reduce the chance of myocarditis.
Some scholars who participated in the research emphasized that young people are not all asymptomatic after being infected with the epidemic. Some people have different degrees of sequelae and complications. In one case, the symptoms lasted for 9 months. Some people even lost their sense of smell and did not even find a fire at home. Reiterated vaccination. Helps reduce severe illness.
The Li Ka Shing Faculty of Medicine of the University of Hong Kong recommends that adolescents receive the second dose of Fubitai vaccine at least three months apart from the first dose to reduce the chance of developing myocarditis.
(File photo/Photo by Xia Jialang)
A research team consisting of the Department of Paediatric and Adolescent Sciences, the Department of Pharmacology and Pharmacy and the Department of Internal Medicine of the Faculty of Medicine of HKU used data from the COVID-19 Vaccine Safety Surveillance Programme, the Electronic Medical Records of the Hospital Authority and the vaccination records of the Department of Health, Assess the risk of side effects or adverse reactions in the public following vaccination.
The first study found that of the roughly 225,000 teens who had been vaccinated as of October 18 last year, 43 were hospitalized for myocarditis after being vaccinated with Forbitx, and 36 of them developed after a second dose of the vaccine.
For example, three weeks after the first injection of Fubitai, another injection is given, and the relative risk is estimated to be 7.11 times that of the first injection.
The second study found that between June 14 and September 4 last year, about 178,000 citizens aged 12 to 17 were vaccinated with about 305,000 doses of Fubitai vaccine, and 33 adolescents developed acute myocarditis after vaccination. or pericarditis, of which 27 developed after the second shot.
All patients had mild symptoms and recovered spontaneously without the use of steroids, intravenous immune globulin, inotropes, or circulatory aids.
A third study found 160 cases of myocarditis or pericarditis as of Aug. 2 last year, with an estimated incidence of 0.31 and 0.57 cases per 100,000 doses of Sinovac and Forbix, respectively.
Compared with hospital controls, the risk of myocarditis or pericarditis was found to be approximately three times higher with the vaccinated compound than in the unvaccinated group, mainly related to the second dose of the compound.
There are currently no data showing a significant association between Sinovac and myocarditis or pericarditis.
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There was a case of losing the sense of smell and the fire in the home was not found
Guan Rihua, an honorary clinical associate professor of the Department of Paediatric and Adolescent Sciences of the Faculty of Medicine of the University of Hong Kong, who conducted a study, said that one dose of vaccine alone may not be enough, because the antibody level will gradually decline to a certain extent, so it is recommended that two doses of vaccine should not be separated. 21 days, but extended to 12 weeks, it is believed that the proportion of myocarditis can be reduced by 10%.
He shared that in the past two years, he treated many children infected with the virus and found that they were not asymptomatic. On the contrary, some of them developed sequelae and complications of varying degrees, such as loss of taste and smell, and even a multi-system inflammatory syndrome, which can affect the lungs. Department, liver, kidney, etc., and even life-threatening.
He said that the sequelae of some cases lasted for 9 months; some cases said that they would smell a strange smell, or they could not smell the fire at home, which described the situation as dangerous; there were also athletes who were infected with the virus and suffered lung damage and even walked up the stairs. There are also problems.
Huang Zhiji, head of the Department of Pharmacology and Pharmacy of the Faculty of Medicine of the University of Hong Kong, appealed that three months after the first dose of Fubitai vaccine, the second dose can be considered, which will help reduce the risk of myocarditis. There is less chance of serious illness, emphasizing that "it's not that children who are provoked without problems will have serious problems and side effects. Don't take unnecessary risks. When you know that the side effects of injections are very low, there is a chance of serious sequelae if you get infected without injections, and encourage them as soon as possible. Get vaccinated," and suggested "one shot first, then a second shot after 3 months, and a third shot if necessary."
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