Q. Write short note on the following

• Organ Specific
• Tissue Specific
• Pulse Polio Programme

Dear student,
Please find below the answer to your 3^rd and 5^th query - 

Answer 3^rd 

 Vector is an organism which passes a particular trait without being affected whereas, a carrier is an organism who do not possess any symptoms of a disease but contains a disease-causing pathogen which it passes to another organism.

Answer 5^th 
A person suffering from AIDS cannot fight even a small infection because the HIV virus which causes the disease affects the immune system of a person and immunity gets reduced. Actually, the HIV virus destroys all the lymphocytes present in the blood. Lymphocytes provide immunity to our body against any disease or infection. So in the absence of lymphocytes, our body becomes more susceptible to even a minor infection.

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