A change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus from a protozoan [goid 1562] [evidence IEA]; Any process that stops, prevents, or reduces the rate of type IV hypersensitivity, a type of inflammatory response [goid 1808] [evidence IEA]; The directed movement of a motile cell or organism, or the directed growth of a cell guided by a specific chemical concentration gradient. Movement may be towards a higher concentration (positive chemotaxis) or towards a lower concentration (negative chemotaxis) [goid 6935] [pmid 10753822] [evidence TAS]; A defense response that is mediated by cells [goid 6968] [pmid 1683685] [evidence TAS]; Any process that stops, prevents or reduces the frequency, rate or extent of cell adhesion [goid 7162] [pmid 10753822] [evidence TAS]; Any cellular process that results in the specification, formation or maintenance of anisotropic intracellular organization or cell growth patterns [goid 7163] [pmid 10753822] [evidence TAS]; Any series of molecular signals initiated by the binding of an extracellular ligand to a receptor on the surface of the target cell [goid 7166] [evidence IEA]; Any process induced by extracellular signals that directly activates any of the steps required for cell death by apoptosis [goid 8624] [evidence IEA]; The process of providing, via surface-bound receptor-ligand pairs, a second, antigen-independent, signal in addition to that provided by the T cell receptor to augment T cell activation [goid 31295] [evidence IEA]; Any process that activates or increases the rate or extent of T cell proliferation [goid 42102] [evidence IEA]; Any process that stops, prevents or reduces the rate or extent of T cell proliferation [goid 42130] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of tumor necrosis factor, an inflammatory cytokine produced by macrophages/monocytes during acute inflammation and which is responsible for a diverse range of signaling events within cells, leading to necrosis or apoptosis [goid 42535] [pmid 10899905] [evidence IDA]; Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism [goid 42742] [pmid 10899905] [evidence IDA]; The process of elimination of immature T cells in the thymus which react strongly with self-antigens [goid 45060] [evidence IEA]; Any process that modulates the frequency, rate or extent of the antiviral response of a cell or organism [goid 50688] [evidence IEA]; Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus [goid 50776] [evidence IEA]