Is there a 10% cross-sensitivity between penicillins and ...

According to standard reference texts, penicillin allergy is common, occurring in 1 – 10% of those taking the drug (1, 2). Life threatening problems are much rarer, with anaphylactic reactions occurring in up to 0.05% of treated patients and a fatal outcome in about 5 – 10 % of treated patients (3). ................
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