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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.
Explain the Ecosystems? The ecosystem is yet another level, or ecological unit, studied by ecologists. An ecosystem encompasses all of the organisms (all the populations-the en
What is Infra-diaphragmatic Type of TAPVC? Initial stages of operation are the same as for supracardiac type of TAPVC. The heart is lifted out of the pericardial cavity and c
Measuring ecosystem diversity is not easy, and ther e is no definite index for its measurement. It is generally assessed by the measure of species diversity in an ecosystem, often
Removal of a patient's peripheral intravenous catheter resulted in brief bleeding and the loss of a small amount of blood. Which of the following processes occurred during the form
Define Health and Feeding Problems among Elderly? Malnutrition, both obesity and under nutrition, are common problems linked with elderly. Some of the common disorders such as
Q. Nature of disease? Education is very important for diabetics because it is a lifelong disorder. In order to enable the patient to lead a healthy and a good quality Life free
Define Basic Properties To Proteins, To Be a Good Foaming Agent? A protein must: a) Be able to rapidly absorb at the air-water interface during whipping, b) Undergo rapid
What is Nervous System? The nervous system is made up of associations of cells called neurons. Bundles of neurons are called nerves. The nervous system is divided into two part
Objective of the Radiographic Technique The ball bearings are opaque and their diameter have to be measured with the help of vernier caliper prior to use. (2 to 5 mm diameter b
Define the Objectives to learn about the food processing? After studying this unit, you will be able to: Discuss the concepts and aims of food processing Describe t
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