- Jul 5, 2009
This makes plenty of sense to me. Why it would cost more than a vaccine or why it is considered not to be a replacement for vaccines is a bit of a mystery.
Antibodies are large protein molecules and expensive to produce (or extract from donors). The whole point of vaccines is that a small quantity can be injected, and after two weeks the body's inmune system will have produced large numbers of antibodies. Its a 'free' method of leveraging a natural process. It is also longer lasting, since memory T cells are trained to keep producing antibodies forever.