Credit: Reuters

The COVID-19 vaccine from Pfizer Inc and BioNTech SE mainly causes mild side effects in children ages 5 to 11, according to data published by the US Centers for Disease Control and Prevention.

Data showed that some children were affected after the second dose of the vaccine reported pain at the injection site and other systemic reactions such as fatigue and headache.

The CDC said it had also received reports of 11 cases of myocarditis in 511-year-old children receiving the vaccine, a form of heartburn. Of these, seven had recovered and four were recovering at the time of reporting.

Myocarditis is a rare side effect after mRNA vaccines.

Notification system for adverse vaccination events (VAERS). They received 4,249 adverse event reports, of which 97.6% were not serious, according to the CDC report.

In children in this age group, cases were reported between November 3 and December 19 by the voluntary smartphone-based security monitoring system VAERS and vsafe for adverse events after COVID19 vaccination.

The vaccine was approved for children ages 5 to 15 in the United States in late October and is the only approved vaccine for that age group.

A separate study by the CDC showed that the Pfizer 92 two-dose vaccine was effective against coronavirus infection in adolescents aged 12 to 17 years.

The period of observation for the analysis coincided with the period of dominance of the Delta variant in the United States, the CDC said.

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