Question

1 A. Which antigens are most important in the immune response to the influenza virus?

B. Explain the difference between antigenic drift and antigenic shift in the influenza virus.

C. Which is most likely to lead to a major worldwide pandemic?

D. What is the role of the phenomenon of ‘original antigenic sin’ in immunity to this virus?

Answer 1

Answer A
antibodies against the different influenza antigens produce system humoral immune of which the HA-specific antibody is most important for neutralization of the virus and thus prevention of illness of the person.
Answer B
While the influenza viruses change all the time due to antigenic drift, antigenic shift happens less frequently. In the viruses of type A undergo both antigenic drift and shift and are the only influenza viruses known to cause pandemics, while the influenza type B viruses change only by more gradual process of the antigenic drift.

Answer C

The pathogen which cause severe pandemic is influenza EP analysis indicates that in any given year, a 1 percent probability exists of an influenza pandemic that causes nearly 6 million pneumonia and influenza deaths or more globally.

ANSWER D

the Original matter sin, the propensity of the body's is system to the preferentially utilize the medicine memory supported Theia previous infection in body once a second
slightly different version of that foreign entity (e.g. a virus or bacterium) is encountered in body .