If blood gets on the skin, irrespective of whether there are cuts or abrasions, wash the area well with medicated soap and water. Flush with a solution of one-part bleach to twenty-parts water.
If the skin has been penetrated, allow the wound to bleed to assist in flushing out the contamination. If the eyes are contaminated, flush the eye area thoroughly with water or normal saline solution. If blood gets in the mouth, rinse the mouth with water several times.
It is important to deal with a needle stick injury immediately, as in some cases preventative medication can be offered to the affected individual to reduce the risk of infection.