Covid: What allergies are incompatible with the Pfizer-Biontech vaccine?

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A series of contraindications and types of patients who should not, for the time being, be vaccinated are listed. The BNT162b2 vaccine can be used in people 16 years of age and older, including the elderly because of its efficacy and good tolerance profile.

However, the authority also advises against the use of the vaccine in people with a history of severe anaphylactic-type allergies.

Immunization of pregnant women is only recommended if the potential benefits outweigh the potential risks to the mother and fetus.

On the other hand, anaphylaxis is a dangerous form of allergy, as its result can be fatal. This violent reaction of the immune system can present itself in several forms: hives, respiratory difficulties, digestive signs and malaise.

In general, symptoms appear very quickly and in 10% of cases, a second reaction occurs a few hours after the initial reaction: this is called biphasic anaphylaxis.

Food shock

According to Inserm, several allergens are involved in these reactions. Initially, food is the first responsible, in 60% of cases. The foods most often involved are: eggs, sesame, shellfish, and fish and nuts. These serious reactions can also be caused by the venom of wasps or hornets as well as by the ingestion of certain drugs, particularly in children (anti-inflammatories, beta-blockers).

This caution to the vaccine has been raised because in Great Britain, which began its vaccination several weeks ago, two officials of the countrys National Health Service claim to have suffered a reaction. to the vaccine produced by Pfizer. Both recovered from their reaction after receiving necessary treatment, but research is still being done to understand the circumstances of these reactions.

As a precautionary measure, the UK health authorities currently advise against Pfizer / BioNtech serum for people who have had severe allergic reactions to vaccines, medicines or foods in the past.

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