The brand name of this particular product you referred to is Alferon N, and yes, since it is derived from human leukocytes (white blood cells), it would be considered a minor blood fraction. But, not all interferon medications are considered as blood fractions. Some are produced by recombinant technology, and may be the preferred choice for a patient wanting to avoid all blood derived medications.

Unfortunately, medical personnel don't always realize exactly what is in a medication, so the responsibility falls to the patient to make sure that, if there is ever a question about a medication, ask questions, and have folks double check. It's great to see that you are taking a proactive approach to educating yourself about the options available.