Vaccination may cause side reactions such as fever and swelling of the vaccinated area.

These side effects have also been reported with the new coronavirus vaccine, so it is important to know in advance what the symptoms will be.

According to Kiyoshu Taniguchi, director of clinical research at National Mie Hospital, who is familiar with infectious diseases, side reactions of vaccines such as fever and swelling are the flip side of the "main reaction" of activating immunity, and the function of immunity is It is a manifestation of working and being effective.

Among the new coronavirus vaccines, the Pfizer vaccine, which was first vaccinated in Japan, is the first of the approximately 997,000 vaccinated people, according to the US Advisory Board on Immunization Implementation.

67.7% of people complained of pain at the site

of vaccination,

28.6% of fatigue

, 25.6% of headache

, 17.2% of muscle pain

, 7.4% of fever

, 7.1% of joint pain,

▽ Cold and nausea were

reported in

7% each, and

swelling was reported in 6.8%.

According to the US Centers for Disease Control and Prevention, these symptoms often occur within a day or two after vaccination and often disappear within a few days.

These symptoms are also common to the side reactions reported with influenza vaccines.

According to the Ministry of Health, Labor and Welfare, as a side reaction that occurs after vaccination with a general influenza vaccine, symptoms such as redness, swelling, and pain occur in 10% to 20% of people.

In addition, 5% to 10% of people have fever, headache, chills and malaise.

In addition, according to the materials of the expert group of the Ministry of Health, Labor and Welfare, 93 cases of suspected side reactions of influenza vaccine reported by medical institutions during the season from the death to last year were serious, of which 5 It means that a person has died.

How often do you have severe allergies?

In addition, overseas, it has been reported that there was a case of severe allergy called "anaphylaxis" after vaccination with the new coronavirus.

According to sources from the US Advisory Board on Immunization Implementation, anaphylaxis occurred five times per million vaccinations.

Anaphylaxis has also been reported in influenza vaccines, but the frequency is said to be about 1 in 1 million, and the new coronavirus vaccine is more common.

According to vaccine experts, even if anaphylaxis occurs, it will not be life-threatening if you take appropriate measures such as injecting adrenaline.