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Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
The mask covers both the mouth and nose to prevent exposure to body fluids and airborne droplets.
Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery.
Methods to prevent pregnancy
Therapy to Prevent PTSD after Disaster
How the cortical reaction in a mouse egg is thought to prevent additional sperm from entering the eg