本题目来源于试卷: Unity and Diversity A.5 Viruses，类别为 IB生物学
[问答题]
1.Outline the methods t: ;nzzq(ph-;l zgmy 5s6up4 dr3qzo k vut ta .3szx51)*grl1pn pboo372n+q of HIV transmission and its effects on the immune system.
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2.Discuss the need for international cooperation to fight contagious diseases such as Ebola.
3.Antibiotics are an essential tool of modern medicine. Outline the strengths and limitations of antibiotics.
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