预防服药和预防接种过敏反应发生率为0.08%，未出现严重的异常反应。
The rate of adverse events following immunization was 0.08%. No severe adverse events occurred following immunization.
它认真调查了患者生活史中过敏反应发生的具体时间，发现发生时间乃关键性因素。
It looked carefully at the time in the patients' lives when their allergies were active, and it found that this timing was crucial.
在第一次过敏反应发生后，对花生过敏或者对贝类过敏可能会引起更严重的过敏反应。
An allergy to peanutsor shellfish may cause more severe reactions after the first exposures.
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