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Q. Why does not a long lasting vaccine against common cold exist yet?
Viruses that present a high mutation rate like the virus that causes the common cold escape easily from the action of vaccines against them. After a primary immune response (artificially or natural induced) against the virus in the next season of infection new mutant resistant strains appear and the protection obtained with the immune response of the last season is lost (One could say that the high mutation rate is a form of "immunization" found by these viruses.)
characteristics of class mamalias
Estimate the molar mass of protein? An aqueous solution of the protein bovine serum albumin, containing 2:00 *10 -2 g of protein per cubic centimeter, has an osmotic pressure
photosynthesis moderates global warming, briefly explain this statement
BIOLOGY IN DISPELLING MYTHS AND MISBELIEFS - Varieties of myths still exist in our society, and can be removed by the knowledge of Biology. Some of these are- 1. Snake
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Management of waste amalgam and wastes containing mercury: As all of us know that amalgam is used for restorations very widely.An operator of a dental operation that produces w
Nursing Assessment During assessment the child's parents will give you history of upper respiratory infection or skin infection in the previous one to three weeks. Initially
what so special for phylum annelida
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What are some ways that humans can reduce the effect they have on the phosphorus cycle?
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