 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] munoglobulin deficiency). This medication is made from healthy human blood that has high levels of certain defensive substances (antibodies), which help fight infections. Routine vaccination is usually the best way to protect against infection. Talk with your doctor about a recommended vaccination schedule. How to use Gamastan Vial This medication is injected into a muscle as directed by your doctor. The dosage and schedule of injections depends on your medical condition, weight, and response to treatment. Large doses (more than 10 milliliters) should be divided into 2 or more injections and given at separate injection sites. This medication is given as soon as possible after you have had contact with (been exposed to) someone with hepatitis A, measles, chicken pox, or rubella. If you wait too long after being exposed, the medication may not be effective. Not everyone who is exposed to these infections should receive immunoglobulin. Discuss the risks and benefits with your doctor. If you are traveling to an area where hepatitis A is common, this medication may be given along with the hepatitis A vaccine (in a separate injection). This medication will help protect you until your body can make antibodies from the vaccine. If you cannot use the hepatitis A vaccine, you may need to receive more doses </s>