> The part of our immune system designed to defend against viruses has its own name and I don't recall it. Is it, 'the adaptive immune system" The adaptive immunity has two important cells: B and T cells (B means cells that mature in the bone marrow, while T cells develop in the thymus). B cells make antibodies, and are not as useful in defending against virus infection as T cells. T cells are highly important in the immune response to virus infection because they do a few things: Kills virus-infected cells Activate interferon that inhibits virus replication Activates cells that kills virus-infected cells