people who get an influenza vaccine produce antibodies that protect them against being infected by the particular influenza viruses that are used in the vaccine. which of the following explains why an influenza vaccine might be ineffective?

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.