inclusion criteria: * age ≥ 18 years * anaphylactic reaction to a covid-19 vaccine administered by pfizer-biontech or janssen or vaxzevria or moderna, at least 3 weeks old at the time of the allergology consultation. an anaphylactic reaction is defined as the occurrence of any of the following systemic manifestations within a few hours of administration of a covid-19 vaccine: * skin rash with urticaria and/or angiodema, * and/or associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (intense abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of malaise), and/or hypotension, tachycardia. * affiliation to a social security system * signature of the informed consent * stop taking antihistamines at least 3 days before skin allergy tests are performed

inclusion criteria: * age ≥ 18 years * anaphylactic reaction to a covid-19 vaccine administered by pfizer-biontech or janssen or vaxzevria or moderna, at least 3 weeks old at the time of the allergology consultation. an anaphylactic reaction is defined as the occurrence of any of the following systemic manifestations within a few hours of administration of a covid-19 vaccine: * skin rash with urticaria and/or angiodema, * and/or associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (intense abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of malaise), and/or hypotension, tachycardia. * affiliation to a social security system * signature of the informed consent * stop taking antihistamines at least 3 days before skin allergy tests are performed

inclusion criteria: * age ≥ 18 years * anaphylactic reaction at least 3 weeks old prior to allergology consultation, when administered a covid-19 vaccine. anaphylactic reaction is defined as the occurrence within hours of administration of a covid-19 vaccine of any of the following systemic manifestations; skin rash such as urticaria and/or angiodema, associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (severe abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of faintness), and/or hypotension, tachycardia. * affiliation to a social security system * signature of the informed consent * stop taking antihistamines at least 3 days before skin allergy tests are performed

inclusion criteria: * age ≥ 18 years * anaphylactic reaction at least 3 weeks old prior to allergology consultation, when administered a covid-19 vaccine. anaphylactic reaction is defined as the occurrence within hours of administration of a covid-19 vaccine of any of the following systemic manifestations; skin rash such as urticaria and/or angiodema, associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (severe abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of faintness), and/or hypotension, tachycardia. * affiliation to a social security system * signature of the informed consent * stop taking antihistamines at least 3 days before skin allergy tests are performed

inclusion criteria: - age ≥ 18 years - anaphylactic reaction at least 3 weeks old prior to allergology consultation, when administered a covid-19 vaccine. anaphylactic reaction is defined as the occurrence within hours of administration of a covid-19 vaccine of any of the following systemic manifestations; skin rash such as urticaria and/or angiodema, associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (severe abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of faintness), and/or hypotension, tachycardia. - affiliation to a social security system - signature of the informed consent - stop taking antihistamines at least 3 days before skin allergy tests are performed

inclusion criteria: - age ≥ 18 years - anaphylactic reaction at least 3 weeks old prior to allergology consultation, when administered a covid-19 vaccine. anaphylactic reaction is defined as the occurrence within hours of administration of a covid-19 vaccine of any of the following systemic manifestations; skin rash such as urticaria and/or angiodema, associated with respiratory signs (dyspnea, bronchospasm, desaturation), and/or digestive disorders (severe abdominal pain, diarrhea, vomiting, nausea), and/or neurological disorders (loss of consciousness, feeling of faintness), and/or hypotension, tachycardia. - affiliation to a social security system - signature of the informed consent - stop taking antihistamines at least 3 days before skin allergy tests are performed