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These rare side effects after a flu shot include chest pain, heavy or ongoing bleeding and hives, swelling or trouble breathing

Vitamin B12 may alter the behaviour of bacteria on your skin

The face, neck, and mouth should be examined in detail.42,43 A proposed system for this examination may be as follows: beginning with an inspection of the skin and anatomy of the ears, nose, mouth, teeth, gums, and pharynx, evaluating colour, inflammation, and potential asymmetry, then palpating the paranasal sinuses, temporomandibular joint, and muscles of mastication, exploring strength and range of motion in jaw opening

Doctors must connect CBC results with a patients symptoms and history to form a complete picture