Why is it very difficult to develop an antiviral drug or a wide spectrum vaccine for the treatment of viral infections such as COVID-19? (2 marks) 3. Draw the structures of molnupiravir and dexamethasone. (1 mark) 4. Which of the drugs is recommended to be used for early stage infection (categories 2 and 3) and which one is for a later stage of infection (categories 4 and 5)? Explain your answer and cite your references. (4 marks)What is the difference between agglutination and coagulation in the blood?

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