Give reason:
a) Making anti-viral medicines is harder than making anti-bacterial medicines.
b) It is possible to immunize the person against rabies after the dog cat bite.
c) A virus enters the immune system of a patient and damages its function.
(i) Name the diseases a patient is suffering from.
(ii)Name the pathogen and two modes of transmission of this virus.
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Answer:
a. Making anti-viral drugs is more difficult than making anti-bacterial medicines because viruses have very few biochemical mechanisms of their own. They make use of host machinery which replicates
b. Rabies virus has 1-3 months of incubation period. The long period of incubation makes it possible for a rabies vaccination, after a bite, to develop immunity and prevent the appearance of the disease.
c. (i) AIDS (Acquired Immuno Deficiency Syndrome)
(ii) HIV (Human Immuno deficiency Virus)
Two modes of transmission of AIDS are:
(i) Sexual contact
(ii) Blood transfusion
Explanation:
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