Skip to content

Medical portal site for foreign residents


[5 years old to 11 years old] Effects and side effects of COVID-19 vaccination

[Inquiries] Shibuya Ward Novel Coronavirus Vaccine Call Center (Phone: 0120-045-405 )
[Inquiries] Regional Health Division Vaccination Section (Phone: 03-3463-1269)

The website of the Ministry of Health, Labor and Welfare provides information about the new coronavirus vaccine, including information about the new coronavirus vaccine, information about the vaccine, answers to questions, and notices for everyone involved in vaccination.

Dear Children and Parents,

Since certain scientific findings have been obtained under the Omicron strain epidemic, it was deemed appropriate to apply the obligation to make efforts for pediatric vaccination from September 6, 2020 (Tuesday). However, vaccination is not compulsory, and it remains to be done based on the judgment of the person (child) or guardian. Please also tell your children not to force others to get vaccinated or to discriminate against those who have not been vaccinated.
If you have any concerns about vaccination, please consult your family doctor.

Guidance brochure about inoculation

effects and side effects


The results of clinical trials with pediatric vaccines (5 to 11 years old) have been reported overseas. Vaccines were found to be 90% more effective in preventing the onset of burns 7 days after the second dose than those who were not vaccinated. In other words, it is expected to be effective in preventing the onset of diseases with an efficacy rate similar to that of people over the age of 12.

side reaction

Pfizer vaccines have been confirmed to cause symptoms such as pain at the injection site, malaise, headache, fever, etc. in children (5 to 11 years old) as well as those aged 12 years and over, but most of them are Based on the information available at this time, it has been determined that there are no serious safety concerns. For more information, please refer to New Corona Vaccine Q&A-Children aged 5 to 11 years old: Effects and side effects of the new coronavirus vaccine and the concept of vaccination (Ministry of Health, Labor and Welfare website) .

For Pfizer

symptoms Percentage of people with symptoms
Pain at the injection site, feeling tired 50 percent or more
Headache, muscle pain, chills, swelling at the injection site 10 to 50 percent
fever, joint pain, diarrhea, vomiting 1 to 10 percent
(Note) Various symptoms seen within 7 days after either the 1st or 2nd dose.

Quoted from: New Corona Vaccine Q&A "What kind of side effects do children (5 to 11 years old) get vaccinated?" (Ministry of Health, Labor and Welfare website)

to the top of the page

Back to blog