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乙型肝炎 (15分)

請問如果我在五年前驗過乙型肝炎抗原和抗體是屬陰性(-ve)和抗體少過0.1,

於是那時便打了三針乙肝預防疫苗. 咁現在打加強針前應該只驗抗體,定驗抗原加抗體? 我的意思是:如果打預防針前是陰性(-ve) 即是無受乙肝炎感染,咁打了那三針後是否就不會令抗原變陽性(+ve).所以是否以後都不必驗抗原?? 只需驗抗體?? Thanks!

1 個解答

評分
  • 1 十年前
    最愛解答

    If HBsAg (乙型肝炎抗原) -ve, this indicate the person is not a carrier of HBV (乙型肝炎) nor any recent HBV infection

    If you received 3 vaccine injections, you will developed HBsAb (乙型肝炎抗體) in 95% of the case which indicate you are protected from subsequent HBV infection. However for those with impaired immune (免疫) system (eg leukemia 血癌, renal disease 腎病 or HIV active infection), chance to develop HBsAb will be quite low (eg 20-40%).

    After 5 yrs time, the body HBsAb level will be very low but still detectable. This low level of HBsAb do not indicate that the person is not protected from the HBV infection thereafter. The level of HBsAb will increased rapidly when the body is challenged by HBV infection.

    Therefore, you can check the HBsAb (乙型肝炎抗體) level only and no need to check for HBsAg (乙型肝炎抗原) again. Even with very low level of HbsAb, you still get protected.

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