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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.
(a) Trace the succession of plants on a dry bare rock. (b) How does phosphorus cycle vary from carbon cycle?
detail notes on seed dormancy and seed germination
The original DNA sequence when ,transcribed and translated would yield five successive valine residues. But the altered sequence would correspondingly read one aspartate and four s
Define Nutritional Needs of the Elderly? In this, we learnt about the nutritional needs of the elderly, and in doing so we have also focused on many other aspects such as who d
Human Factor Theory - Accident Causation This theory of accident causation suggests that a chain of events caused by human error is the cause of accident. The chain of events
my question is what is phyletic lineage
Q. What are the conditions favouring the outbreak of Staphylococcal food poisoning? • Botulism is caused by the bacteria Clostridium botulinum. • All low acid foods can s
What is dengue? Dengue, or dengue fever, is an epidemic disease in some countries (for instance, in Brazil), and its most dangerous form is hemorrhagic dengue. It is caused by
Modes of NO - 3 reduction Accordingly, there are the following three basic modes of NO - 3 reduction. Directly dependent upon photosynthesis as in cyanobacter
Q. What happens when the oxygen supply is inadequate to maintain aerobic cellular respiration during muscle exercise? If oxygen from myoglobin or hemoglobin is not enough for t
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