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