A response is an answer or reply that can be in a word or action.
A response that you can control
When someone says "no response is also a response," they mean that choosing not to reply or react to a situation or message can convey a message or signal just as effectively as giving a direct response.
Since immunogenic means 'Capable of inducing an immune response; antigenic.' I would suggest that nonimmunogenic would mean that an immune response would not be induced.
Response to what happens inside you
speed response system
An action in response or in return for another.
Totally
Stimulus - Response
they expect written response
Response means reaction, as in a movement, change, or emission (like heat, light, or sound).
Initial Fire Response
"La respuesta" means "the answer" or "the response".