Hong Kong: 1 in 2700 teenaged males develops a clinical case of myocarditis after the 2nd Pfizer shot/ Clin Inf Dis

About 180,000 adolescents received Comirnaty vaccine in Hong Kong.  33 developed myocarditis.  88% were males and 12% were females.  82% followed the second dose, and 18% followed the first dose.  The mean age of these cases was 15.  One in 2700 boys got a diagnosed case of myocarditis after their second shot.

Epidemiology of Acute Myocarditis/Pericarditis in Hong Kong Adolescents Following Comirnaty Vaccination

Gilbert T Chua, FHKCPaed, FHKAM(Paed), Mike Yat Wah Kwan, MSc(Applied Epidemiology) CUHK, Celine S L Chui, PhD, Robert David Smith, PhD, Edmund Chi-Lok Cheung, BSc, Tian Tian, Ma, PhD, Miriam T Y Leung, BPharm, Sabrina Siu Ling Tsao, MBBS(UK), FACC(USA), Elaine Kan, FRCR, FHKCR, Wing Kei Carol Ng, FRCR, FHKAM … Show more
Clinical Infectious Diseases, ciab989, https://doi.org/10.1093/cid/ciab989

Published:

 

28 November 2021

 

Abstract

Background

Age-specific incidence of acute myocarditis/pericarditis in adolescents following Comirnaty vaccination in Asia is lacking. This study aimed to study the clinical characteristics and incidence of acute myocarditis/pericarditis among Hong Kong adolescents following Comirnaty vaccination.

Methods

This is a population cohort study in Hong Kong that monitored adverse events following immunization through a pharmacovigilance system for COVID-19 vaccines. All adolescents aged between 12 and 17 years following Comirnaty vaccination were monitored under the COVID-19 vaccine Adverse Event Response and Evaluation Programme. The clinical characteristics and overall incidence of acute myocarditis/pericarditis in adolescents following Comirnaty vaccination were analysed.

Results

Between 14 June 2021 and 4 September 2021, 33 Chinese adolescents who developed acute myocarditis/pericarditis following Comirnaty vaccination were identified. 29 (87.88%) were males and 4 (12.12%) were females, with a median age of 15.25 years. 27 (81.82%) and 6 (18.18%) cases developed acute myocarditis/pericarditis after receiving the second and first dose, respectively. All cases are mild and required only conservative management.The overall incidence of acute myocarditis/pericarditis was 18.52 (95% Confidence Interval [CI], 11.67-29.01) per 100,000 persons vaccinated. The incidence after the first and second doses were 3.37 (95%CI 1.12-9.51) and 21.22 (95%CI 13.78-32.28 per 100,000 persons vaccinated, respectively. Among male adolescents, the incidence after the first and second doses were 5.57 (95% CI 2.38-12.53) and 37.32 (95% CI 26.98-51.25) per 100,000 persons vaccinated.

Conclusions

There is a significant increase in the risk of acute myocarditis/pericarditis following Comirnaty vaccination among Chinese male adolescents, especially after the second dose.

Similar Posts

Opinion: Where did covid come from? We need to get serious about finding out./ Wa Po

It will be interesting to watch the spin and see who among us actually wants to find the answer.  But this WaPo editorial is welcome nonethless–Nass Opinion by the  Washington Post Editorial Board July 6, 2021 at 3:18 p.m. EDT An impressive roster of political leaders and experts in science and public health have called for…

Here is how you do the Big Lie/ CNBC and the 99.5% of deaths in the unvaccinated

First CNBC set up the story.  It provided facts that actually don’t mean very much. but sound frightening.  It said the virus is 1,000 times more transmissible than the original. In fact, precisely this strategy was used in the early days of Covid.   The variant is highly contagious, largely because people infected with the…

Federal Bureau of Invention: CASE CLOSED (and Ivins did it)

But FBI’s report, documents and accompanying information (only pertaining to Ivins, not to the rest of the investigation) were released on Friday afternoon… which means the FBI anticipated doubt and ridicule. And the National Academies of Science (NAS) is several months away from issuing its $879,550 report on the microbial forensics, suggesting a) asking NAS…

Shouldn’t Congress be Consulted?/ Military Officers/ Francoise Hollande/ Angela Merkel

NBC News queried 700 adults on Aug 28-29, 2013.   The most interesting answer I found to be the following: Q12  Do you think that President Obama should or should not be required to receive approval from Congress before taking military action in Syria? Should be required to receive approval ………………. 79 Should not be…

Today, Nebraska protected its medical providers who treat patients with hydroxychloroquine and ivermectin (off-label) for COVID-19

https://ago.nebraska.gov/opinions/prescription-ivermectin-or-hydroxychloroquine-label-medicines-prevention-or-treatment-covid Prescription of Ivermectin or Hydroxychloroquine as Off-Label Medicines for the Prevention or Treatment of Covid-19 Opinion Number: 21-017 Opinion Date: Friday, October 15, 2021 Prescription of Ivermectin or Hydroxychloroquine as Off-Label Medicines for the Prevention or Treatment of Covid-19 Opinion PDF:   21-017   https://ago.nebraska.gov/sites/ago.nebraska.gov/files/docs/opinions/21-017_0.pdf I am unable to extract sections from the pdf, but the top of…

6 Comments

  3. In Europe the vaccine naming protocols are different. It can be called Comirnaty there under emergency use, but in the US that name can only be used for the licensed vaccine

  4. Thank you, Dr. Nass.

    I find the "27 (81.82%) and 6 (18.18%) cases developed acute myocarditis/pericarditis after receiving the second and first dose, respectively. All cases are mild" part bizarre. How can acute myocarditis/pericarditis ever be considered "mild"? I can't quite bring myself to give this large group of scientists the "language issues" pass….

  5. Hi Old Leon,

    I have the feeling that if you don't say that, your article does not get published.

    These numbers appear to be the most reliable yet, better than the VAERS and the VSD data, which has crazy low rates of everything.

    Myocarditis is mild when it is someone else's child.

  6. Hi again, Dr. Nass. Thanks for your reply to my post. Hadn't thought of the angle re. getting a paper published. Part of the sad commentary on our times. Wishing you all the best, as always.

Comments are closed.