I want to know the answer to the following question:
Rather than cells, in humoral immunology where did the molecules that cause immune response reside?
All the background I'm provided with is that "In contrast, the humoral theory of immunity, held by Robert Koch and Emil von Behring, among others, stated that the active immune agents were soluble components (molecules) found in the organism’s “humors” rather than its cells.". Is that enough to answer the question?