my brother has taken 4doses of hep b vac..how should i know it has working or not...and how can we find useable and unusable vac..is there any changes in liquid..?
Hello. Welcome to Chat Doctor forum. Only three doses of vaccine are given at 0,1and 6 months. Whether your vaccine is giving you protection or not can be found out by measuring anthem and not Bag. The values of antics should be more than 10 IU/ml. Any person who is previously vaccinated is found to have antics less than 10 IU/ml should be given a booster dose of HEP-B Vaccine.Don't use the vaccine if found to have some suspended particles or if its color has changed. Thanks and good luck.