The vaccine prevents infection in adolescents by 90%

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A joint study by the Clalit Research Institute and Harvard University, published overnight (Thursday), examined 12- to 18-year-old Israeli boys who had been vaccinated against corona, indicating a significant victory of the vaccine against the virus. According to the findings, there is a 90% efficiency in preventing cases of infection and an efficiency of 93% in preventing symptomatic disease.

The study was conducted during the spread of the Delta strain in Israel, in the fourth wave, until about a month ago. It was based on data from 94,354 Israeli youths aged 12 to 18 who were vaccinated, compared with the same number of unvaccinated, although during the study about 14,000 boys from the second group were vaccinated.

“With the outbreak of the fourth wave, due to the Delta strain, the question arose as to whether the vaccine used in Israel also provides adequate protection against this strain, as it protected against the alpha strain,” said Prof. Ran Blitzer, head of Clalit’s innovation division. “Because most adolescents were first vaccinated in this wave, evaluating the effectiveness of the vaccine in them could provide an answer to the question. The results of the study unequivocally show that the vaccine is most effective in preventing Delta strain infection and preventing symptomatic disease one week after receiving two doses.”

Blitzer stressed: “The results of the study show that the strength of protection against the Delta strain is very similar to that observed in young adults against the alpha strain in the past. These findings provide important and well-founded information for parents who are undecided about vaccinating their adolescent children.”

The health system hopes that these data will encourage teenagers to get vaccinated, as it turns out that many have not yet done so: 32% of 12- to 15-year-olds have not been vaccinated, and 13% of 16- to 18-year-olds have avoided it.

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