a specific response is a response from the immune system to fight off a specific pathogen. Non specific responses from the immune system are response that are given out for any pathogen that enter the body.
Mean corpuscular hemoglobin (MCH) is a calculation of the average amount of hemoglobin inside a single red blood cell. Mean corpuscular hemoglobin concentration (MCHC) is a calculation of the average concentration of hemoglobin inside a single red blood cell. Red cell distribution width (RDW) is a calculation of the variation in the size of RBCs.
MCH and MCHC are called red blood cell indices. They measure the average amount of hemoglobin contained within your red blood cells. Don't worry about minor abnormalities in these indices. These tests really don't deserve all that much attention if your other CBC results are within normal limits.