Coronavirus vaccines: Why are some countries recommending single dose for teens, young adults?


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Authorities in many countries recommend a single dose injection after cases of myocarditis in adolescents followed by a second dose.

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anxiety of myocarditis, inflammation of the heart, after a second covid According to several media outlets, the dose of the vaccine in adolescents and young adults has prompted many countries to turn to a single-dose vaccination strategy for that age group, rather than a double dose.

Authorities in several countries, including England, Norway and Hong Kong, have recommended a single dose of the Pfizer-BioEntech vaccine for children 12 years of age and older. The effort aims to provide partial protection from the coronavirus while reducing the risk of potential side effects such as myocarditis, an adverse reaction sometimes seen in this age group after a second dose of one of the mRNA vaccines. many reports.


Dr. Aaron Glatt, a spokesman for the Infectious Diseases Society of America and professor and president of medicine at Mount Sinai South Nassau on Long Island, New York, weighed in on the reports and told Granthshala News, “This new strategy is certainly a worthwhile evaluation. . If it works it has theoretical and practical advantages.” “However, appropriate full studies to prove that this should be the standard approach remain to be performed and analyzed,” warns Glatt.

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Health officer hong kong Pfizer-BioNTech Recommended Single Dose vaccine for children Last month there were reports of heart inflammation after 12-17 years of age as a side effect of the second dose of the mRNA vaccine. report good By Reuters.

Professor Lau Yu-lung, who chairs a panel of health experts advising Hong Kong government officials on their vaccination programme, told a local media outlet that health experts thought it was only possible for adolescents to receive a single dose. More beneficial was “to greatly reduce the likelihood of heart inflammation,” according to Reuters.

England and Norway are also recommending a single dose of the Pfizer/BioNTech vaccine for children 12-15 years of age and will await a decision on a second dose until further data is available. many reports.

According to Centers for Disease Control and Prevention (CDC)Cases of myocarditis and pericarditis, inflammation of the lining of the heart, occurred more frequently in male adolescents and young adults after the first dose than after receiving the second dose. mRNA COVID-19 Vaccine (Pfizer-BioNtech or Moderna).

Those who reported having myocarditis or pericarditis responded well to medication and recovered quickly, the CDC said. Website.

“These reports are rare and the known and potential benefits of COVID-19 vaccination outweigh the known and potential risks, includingPossible risk of myocarditis or pericarditis

An associate chair of emergency medicine at Northwell Health in New York, Dr. Fred Davis told Granthshala News, “The CDC reports that the myocarditis reporting rate was 40.6 cases per million after the second dose of mRNA COVID-19 vaccines were administered to men aged 12-29 years.” It’s less than 1% in this group.”

Davis, who specializes in emergency medicine, told Granthshala News that myocarditis remains a rare side effect of the mRNA vaccine, and if it does occur, “the majority of these cases respond well to anti-inflammatory medication and rest. Most of these symptoms resolve in one to two weeks.”

Davis also commented on countries that recommend the single-shot strategy and told Granthshala News, “While the approach of offering a single dose of vaccination to children 12 years of age and older would provide less protection (a 52% with two doses versus 88% with two doses (Pfizer), this approach allows more children to be vaccinated with the same number of vaccines, while reducing the already minimal risk of side effects seen after a second dose. does.”

Davis, who is board-certified in emergency medicine and an associate professor at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell in Hampstead, New York, told Granthshala News, “This single-dose approach allows more parents to do this. Will encourage you to feel. The benefits outweigh the risks and get your kids vaccinated.”

Meanwhile, Glatt, who is also a hospital epidemiologist, cautioned that “we also need to understand that in adults, the data clearly show that two doses are needed to achieve strong immunity. ”

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