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What is the virus that causes flu? Why doesn't the body create permanent immunity against that virus? How does the vaccine against flu work?
Flu is a disease caused by the influenza virus, a highly mutant DNA virus. Because of the high mutation rate of the virus, that forms many dissimilar strains, flu always presents epidemic features in affected populations and people may have some flu episodes during life (the immune response made from previous infections is not efficient in future infections).
The vaccine against flu is a vaccine made of attenuated virus of three dissimilar strains. Each year the WHO (World Health Organization) researches and determines which are the strains that should compose the vaccine. This is a method to face the high mutation rate of the virus.
#White blood cell has mainly 5 types right? which is Neutrophil,Monocytes,lymphocytes, basophil and Eosinophil? I wwanted to know is phagocytes a white blood cell, if yes then why
a) In humans, is it the sperm or the ovum which verifies the sex of the offspring? b) Give a reason for your answer. (a) The sperm verifies the sex of the off
Q. What are the structures that participate in the human auditory sensitivity? The structures of the human auditory sensitivity are the ears (middle and internal, external) the
What are the best known representatives of the platyhelminth phylum? The most popular representatives of the platyhelminthes are worms that cause human diseases, like taenia an
Q. What is biotic potential? The Biotic potential is the capability of growth of a given population under hypothetical optimum conditions, i.e., in an environment without limit
Cortex can be described as follows 1) The outer part of the organ, such as, the adrenal cortex, which produces many steroidhormones; 2) in plants, the area of the stem or root
keel is the characteristic feature of flower of 1.tomato 2. tulip 3.ubdugifera 4.aloe
Weaning the Infant from the Incubator When heater output reading is minimal or nil it suggest that infant is capable of generating enough metabolic heat to keep himself war
Prevention of flap necrosis Flap necrosis can be prevented if the surgeon attends to four basic principles. 1. First, the apex of a flap should never be wider than the base,
Contagious ecthyma/ Orf Primarily it is a disease of sheep and goats caused by a dermotropic virus - Orf virus - that belongs to the Parapoxvirus genus of the family Poxviridae. T
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