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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.
I nfectious bronchitis (IB) Infectious bronchitis is a highly contagious respiratory disease of poultry, caused by a virus belonging to the family Coronaviridae. Its existence
all of their function on different system
SED A TIV E HYPNOTICS - They depress the activity of CNS. Reduce excitement, give feeling of calm. Higher doses induces sleep. Sleep inducing drugs are also called
Q. How does the quantity of genetic material differ within the cell during the sequential phases of the cell cycle? The first period of the first phase interphase of the cell c
Epidemiology The organism does not appear to be very host or tissue specific and can infect naturally a large number of avian and mammalian species. Chlamydiosis has been reco
detail about cytoplas
Trophic structure Organisms in a community are closely interrelated with each other through feeding relationships. Another aspect which is quite obvious in a community is th
what is the excretory organ of lizard
recent research on golgi bodies
Catalogue of Larval Forms in Various Animal Groups The larval stages and types found in different groups are many. Each larval type has a different structure and is known by a
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