Question

Why it is difficult to develop vaccine for some viral diseases?​

Answer 1

Answer:

Becoz viruses usually change their shape using their loose sheath cover and also their genetic material is not so stable

hence virus are puzzle in the field of medicine

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Answer 2

Answer:

it is because virus have an ability to change their DNA anytime and vaccines consists of antibodies which have the ability to block the biochemical pathway of a bacteria .antibodies cant work against viral diseases as they do not use the same biochemical pathway as that of bacteria

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