This is another pic from the 'Drugs' volume of the Life Science Library.
Collages by David Gordon.
The blurb reads:
"The chimera of Greek myth, a freakish blend of lion, goat, serpent could not normally be encountered among humans. For, as immunoligist Sir Macfarlane Burnet explains, the human body refuses to be a chimeric mixture; it rejects alien species, such as germs that invade it, destroying them with scavenger cells (white) and chemicals (coloured circles)."