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.
Response to what happens inside you
Totally
speed response system
Stimulus - Response
they expect written response
An action in response or in return for another.
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 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".