After a few years of being diagnosed with HIV infection, a person develops tuberculosis, toxoplasmosis, diarrhea, and significant weight loss. This is most likely due to:

1.	A cytokine storm in the body
2.	A decrease in B lymphocytes count
3.	A decrease in T helper cells count
4.	A side effect of anti-retroviral therapy given

In the human body, the malaria parasite first multiplies in:

Non-specific response to microbes that enter the human body involves the response of all the following except:

Recombinant vaccine used to prevent Hepatitis B contains:
1. killed hepatitis B virus
2. live attenuated hepatitis B virus
3. antigenic polypeptide of hepatitis B virus
4. messenger RNA of yeast

A person has a contaminated wound after a road traffic accident. He has not received tetanus toxoid in his life and was given tetanus immunoglobulin. The type of immunity that will be conferred to this person will be:
1. passive natural immunity.
2. active natural immunity.
3. active artificial immunity.
4. passive artificial immunity.

Fecal-oral route is not involved in the transmission of:

Metastasis shown by malignant tumors:

The microenvironment for the development and maturation of T lymphocytes is provided by:
I. Bone marrow
II. Thymus
III. Spleen

Anabolic steroids are frequently abused. Their side effects include all of the following except:

Diacetyl morphine is commonly known as: