This July, a large part of the group between 40 and 50 years old is receiving or will receive the second dose of Pfizer. A final puncture that usually produces more side effects, especially of a general nature such as fever or discomfort.
The informative portal Voces Expertas, belonging to the Government of Spain, has echoed an article by the Sinc Agency that shows that side effects are usually more frequent after the second dose. The reason is that after administering the last injection, the body has already been in contact with the virus antigen contained in the vaccine and, therefore, may react somewhat more strongly than the first time.
“The response generated by the body is a kind of memory of the first. For this reason, greater immunity is also achieved,” says César Hernández, head of the department of medicines for human use at the Spanish Agency for Medicines and Health Products (AEMPS). ).
In this sense, Matihie Molimard, head of the department of pharmacology at Bordeaux University Hospital, explained to France Inter that when the second dose is administered, the body’s memory cells start up and “the entire defense system tries to fight against to that vaccine,” hence the reactions to the injection.
What side effects of the Pfizer vaccine are the most frequent
According to the fifth pharmacovigilance report of the Spanish Agency for Medicines and Health Products (AEMPS) revealed the following adverse reactions. Likewise, Africa González, professor of Immunology at the University of Vigo, pointed out in an interview on Cadena Ser that “tiredness, muscle pain, swelling of the lymph nodes near the area where the inoculation has occurred are normal consequences of the vaccine”.
1. Febrile state (40%)
2. Headache (30%)
3. Muscle aches (22%)
4. Pain in the vaccination area (15%)
5. Discomfort (12%)
6. Nausea (9%)
7. Arthralgia (8%)
8. Chills (8%)
9. Fatigue (8%)
10. Lymphadenopathy (8%).
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