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Q. What is the virus that causes flu? Why doesn't the body produce permanent immunity against that virus? How does the vaccine against flu work?
Flu is a disease caused through the influenza virus, a highly mutant DNA virus, Due to the high mutation rate of the virus that forms many different strains flu always presents epidemic features in affected populations and people may have several flu episodes during life (the immune response made from previous infections is not proficient in future infections).
The injection against flu is a vaccine made of attenuated virus of three different strains. Each year the World Health Organization (WHO) researches and determines which the strains that should compose the vaccine are. This is a approach to face the high mutation rate of the virus.
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Q. What are melanocytes? Melanocytes are epithelial cells of the skin specialized in secretion of melanin and Melanin is a pigment that besides coloring the iris of the eye and
what is he importance of proteins for living beings
Explain the Most Probable Number (MPN) Techniques? Different procedures and media may be used depending on the food tested and the information sought. Media which can be used i
Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Nicotinic Acetylcholine Receptors (nAChR) in SA node c
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Q What are the different kinds of gas exchange that occur in animals? In beings from the kingdom Animalia the gas exchange may occur either by diffusion, cutaneous respiration,
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Difference between Blind Spot and Yellow Spot - Blind Spot Y ellow spot 1. It lies litte away from yellow spot. 2. No pi
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