(a) What precaution(s) would you recommend to a patient requiring repeated blood transfusion?
(b) If the advise is not followed by the patient there is an apprehension that the patient might contract a disease that would destroy the immune system of his/her body. Explain with the help of schematic diagram only how the immune system would get affected and destroyed.

Give any four causes of cancer.

Mention the causative agent and the preventive measures for the following:
Dengue

174.

Mention the causative agent and the preventive measures for the following:
Amoebaiasis

Briefly discuss the reasons for addiction to alcohol.

Mention one application for each of the following : (a) Passive immunization (b) Antihistamine (c) Colostrum (d) Cytokinin-barrier

Name a human disease, its causal organism, symptoms (any three) and vector, spread by intake of water and food contaminated by human faecal matter.

How do cytokine barriers provide innate immunity in humans?

Name two diseases whose spread can be controlled by the eradication of Aedes mosquitoes.

Name the source plants of heroin drug. How is it obtained from the plants?