Answer:
Secondary
Explanation:
There are several levels of prevention. You might confuse this with primary prevention. Primary prevention is preventing infection, so it has to be done before the patient caught the disease.
The needle-exchange program aims to reduce the spread of blood-borne disease(HIV, hepatitis, etc) from the multiple usages of the same needle. Since the disease already exists, this will be secondary prevention.
The foramen magnum is really important feature for bipedal mammals (basically, animals that walk on two feet). It's basically a whole in the base of the skull that allows the spinal cord to connect the lower body to the brain. Hope this helps!
