A "positive" or "reactive" anti-HBs (or HBsAb) test result indicates that you are protected against the hepatitis B virus.您就不需要打;
如果titer为negative, 您则需要打: The vaccine is usually given as 2, 3, or 4 shots over 1 to 6 months;
A "positive" or "reactive" anti-HBs (or HBsAb) test result indicates that you are protected against the hepatitis B virus.您就不需要打;
如果titer为negative, 您则需要打: The vaccine is usually given as 2, 3, or 4 shots over 1 to 6 months;