Moderna vaccine and myocarditis

If you wish to receive a Pfizer/BioNTech COVID-19 vaccine for your second dose...

Visit COVID-19 Vaccination Information web site and find a vaccination site of your choice. Make a reservation by yourself.
You may find the information from your local government web site as well.
See your local PR magazine or visit a city office counter.

This article is related to the announcement from the ministry of health, welfare and labour of Japan concerning the rare reports of myocarditis and pericarditis after COVID-19 vaccination, especially among men age from 12 to 29 four days after their second shot.
This article is prepared following the instruction from the ministry.
UTokyo vaccination site uses only the Moderna vaccine.

<Announcement of October 14, 2021 from us.> Find information about myocarditis and pericarditis after COVID-19 vaccination here (CDC, USA.) We will collect information on the issue in Japan and announce later. We have no plan to provide Pfizer/BioNTech vaccine at UTokyo vaccination program.

The following is a quote from a brochure of the ministry of health, welfare and labour:

For male teens and twenties, consider receiving the COVID-19 vaccines.
- You may develop myocarditis or pericarditis following SARS-CoV-2 infection at a higher rate than vaccination.
- The Japanese government is recommending the COVID-19 vaccination since the merits are considered to exceed the demerits such as adverse reactions. However, each person should decide whether s/he receives the vaccine.
Male Teens and twenties can choose to receive the Pfizer/BioNTech COVID-19 vaccine.

Compared to the Takeda/Moderna vaccine, the occurrence of myocarditis / pericarditis appears to be lower among teens and twenties male after Pfizer/BioNTech vaccine.
If you have a reservation of Takeda/Moderna vaccine, or if your first shot was Takeda/Moderna, you can get Pfizer/BioNTech vaccines by making reservations for Pfizer/BioNTech.
- See above for the reservation information. Make a reservation by yourself.
If you choose to, you still can receive the Takeda/Moderna vaccine.

Following 4 days after vaccination, see a doctor saying you got a vaccine if you develop chest pain, palpitations, shortness of breath, or swelling of body.

Comparison of the reported frequency of myocarditis / pericarditis (male)
	After vaccination				After SARS-CoV-2 infection
Age	teens		twenties		from 15 to 29 (Japan)	from 12 to 17 (overseas)
Vaccine brand	Pfizer/BioNTech	Takeda/Moderna	Pfizer/BioNTech	Takeda/Moderna	N/A	N/A
Occurrence per 1 million	3.7	28.8	9.6	25.7	834	450

*Anaphylaxis (Report as of October 1. Ministry of Health, Welfare and Labour)

Takeda/Moderna　 2,536 cases ( 21 per 1 million)
Pfizer/BioNTech　　 389 cases (17 per 1 million)