How long does protection from Hepatitis B vaccine last?
Studies indicate that immunologic memory remains intact for at least 20 years among healthy vaccinated individuals who initiated Hepatitis B vaccination >6 months of age. The vaccine confers long-term protection against clinical illness and chronic Hepatitis B virus infection. Cellular immunity appears to persist even though antibody levels might become low or decline below detectable levels.
Among vaccinated cohorts who initiated Hepatitis B vaccination at birth, long-term follow-up studies are ongoing to determine the duration of vaccine-induced immunity.
more info:http://www.cdc.gov/hepatitis/HBV/HBVfaq.htm#overview
問:我兒中學也統一注射過預防針，是不是也該打針了。
答:完成了三針(three doses)的注射,就不需再打了.
Studies indicate that immunologic memory remains intact for at least 20 years among healthy vaccinated individuals who initiated Hepatitis B vaccination >6 months of age. The vaccine confers long-term protection against clinical illness and chronic Hepatitis B virus infection. Cellular immunity appears to persist even though antibody levels might become low or decline below detectable levels.
Among vaccinated cohorts who initiated Hepatitis B vaccination at birth, long-term follow-up studies are ongoing to determine the duration of vaccine-induced immunity.
more info:http://www.cdc.gov/hepatitis/HBV/HBVfaq.htm#overview
問:我兒中學也統一注射過預防針，是不是也該打針了。
答:完成了三針(three doses)的注射,就不需再打了.
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