http://www.advisory.com/daily-briefing/2014/09/25/nurses-sue-massachusetts-hospital-over-flu-vaccine-mandate
疫苗是建築於去年的病毒上的。對今年的新的感冒病毒無效。舊的病毒往往已經毒性不強了。
http://www.advisory.com/daily-briefing/2014/09/25/nurses-sue-massachusetts-hospital-over-flu-vaccine-mandate
疫苗是建築於去年的病毒上的。對今年的新的感冒病毒無效。舊的病毒往往已經毒性不強了。
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