Both the Hib vaccine and the new typhoid vaccine chemically link part of the disease-causing bacterium with a protein molecule that is easily recognizable by a child's developing immune system.
(Both the Hib vaccine and the new typhoid vaccine; chemically link; part of the disease-causing bacterium with a protein molecule) (a protein molecule; is; easily recognizable by a child's developing immune system)
Both the Hib vaccine and the new typhoid vaccine a protein molecule
chemically link is
part of the disease-causing bacterium with a protein molecule
easily recognizable by a child's developing immune system