§ 流感疫苗有效期一年, 每年需接种一次。凡9 岁以下从未接种过流感疫苗的儿童, 均须接种两剂流感疫苗, 而两剂疫苗的接种时间须至少相隔四个星期§ 不宜接种流感疫苗人士：对鸡蛋丶新霉素(Neomycin) 丶庆大霉素(Gentamycin) 或流感疫苗有过敏反应的人士；在注射当日身体不适或发烧的人士都不宜接种。 § 曾对鸡蛋有严重过敏反应的人士, 应由专业医护人员在能识别及处理严重敏感反应的适当医疗场所内接种。流感疫苗内虽含有卵清蛋白（即鸡蛋白质） , 但疫苗制造过程经过反覆纯化, 卵清蛋白的含量极少, 即使对鸡蛋敏感的人士, 在一般情况下亦能安全接种。 § 流感疫苗十分安全，除了接种部位可能会出现痛楚、红肿外，一般并无其他副作用。部分人士在接种后6 至12 小时内可能会出现发烧、肌肉疼痛，以及疲倦等症状，这些症状通常会在两天内减退。如持续发烧或不适，请咨询医生意见。若出现罕见的风疹块、 口舌肿胀、手脚麻痹、无力及呼吸困难等不良反应，患者必须立即求医。 § The vaccine is effective for 1 year; you should take the influenza vaccine annually. Children under 9 years old who have never received any influenza vaccine are recommended to have 2 doses of influenza vaccine with a minimum interval of 4 weeks § People who are allergic to eggs, Neomycin, Gentamycin or flu vaccine; and/or people who have fever should not take influenza vaccine 。 § Individuals with a history of anaphylaxis to eggs should have seasonal influenza vaccine administered by health care professionals in appropriate medical facilities with capacity to recognize and manage severe allergic reactions. Influenza vaccine contains ovalbumin (a chicken protein), but the vaccine manufacturing process involves repeated purification and the ovalbumin content is very little. Even people who are allergic to eggs are generally safe to receive vaccination 。 § Inactivated influenza vaccine is very safe and usually well tolerated, apart from occasional soreness, redness or swelling at the vaccination site. Some people may experience fever, muscle pain, and tiredness beginning 6 to 12 hours after vaccination. These usually improve in two days. If fever or discomfort persists, please consult a doctor. Severe allergic reactions like hives, swelling of the lips or tongue, and difficulties in breathing, or serious adverse events such as limb numbness or weakness are rare but require emergency consultation.