A new study in Hong Kong revealed that adolescents were seven times more likely to develop myocarditis after receiving a second dose of the Pfizer Covid-19 vaccine. The study was published last February 25th at the reputable JAMA Pediatrics Magazine of the American Medical Association.
“Cases of myocarditis following the second dose of messenger RNA (mRNA) vaccine are accruing worldwide, especially in younger male adults and adolescents.1–4 In weighing the risk of myocarditis against the benefit of preventing severe COVID-19, Norway, the UK, and Taiwan have suspended the second dose of mRNA vaccine for adolescents. Similarly, adolescents (aged 12-17 years) in Hong Kong have been recommended to receive 1 dose of BNT162b2 instead of 2 doses 21 days apart since September 15, 2021,” according to the new study.
The study revealed Forty-three (43) adolescents had developed myocarditis-related hospitalization after receiving the Pfizer vaccine, and 84% of the hospitalizations (36 of 43) happened after the second dose.
“The crude risk ratio of the second dose vs first dose was 7.11 (95% CI, 3.16-15.97). The cumulative incidence of myocarditis decreased from 43 cases in 202 315 adolescents vaccinated (21.25, 95% CI, 15.38-28.63) per 100 000 persons to 0 cases in 22 245 adolescents vaccinated at implementation of the single-dose policy.”
The investigation concluded that the best way to reduce the risks of myocarditis among adolescents “could be the use of single-dose only, a lower dosage for 2 doses as recommended for children aged 5 to 11 years, or a lengthened interval between doses.”
Portugal Resident reported:
This research (click here) revealed that after the administration of the second dose of Pfizer vaccine to teens in Hong Kong, an incidence of 39 cases of myocarditis per 100,000 inhabitants was observed. Put another way, for every 2,563 teens vaccinated with two doses, one developed that serious infection of the heart”.
This differs from a “very much lower incidence” (around five cases per 100,000 vaccinated) in situations where teens were only offered one dose of vaccine.
UM confirms that which has already been flagged: teenage boys (and young men) are statistically likely to develop myocarditis post-vaccination for Covid-19 than teenage girls (young women).
The cohort study carried out in Hong Kong analysed data between March 10 and October 18 last year. “But the preliminary results will have shown the clear and elevated risk of myocarditis which is why Chinese authorities decided, on September 15, that they should not be administering second doses” to adolescents, says UM.
Read more here.
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