<unk> s, also known as<unk> ors, are substances (drugs and nutrients) that stimulate the immune system by inducing activation or increasing activity of any of its components. One notable example is the granulocyte macrophage colony-stimulating factor.
Immunostimulant
Antiseptic
Antimicrobial
Antiviral drug
Antifungal
Antiparasitic
Prebiotic 
Analgesic