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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Von Magnus phenomenon:
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The correct answer is  Ans. is 'd' i.e., Virus yields has high Hemagglutination low infectivityIncomplete viruses: Due to defect during assembly of viral components, some of the daughter virions that are produced may not be infective. Example of such incomplete virus is the influenza virus that shows a high Hemagglutination titer but with a low infectivity. This is known as von Magnus phenomenon.