Long lasting vaccine against common cold, Biology

Assignment Help:

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.)


Related Discussions:- Long lasting vaccine against common cold

What are enantiomers, Enantiomers: Select one: a. Have the same molec...

Enantiomers: Select one: a. Have the same molecular weight b. Have the same connectivity c. Are mirror images d. Are non-superimposable e. All of the above

Illustrate homologous chromosomes, Q. In which period of meiosis does the p...

Q. In which period of meiosis does the pairing of homologous chromosomes occur? The pairing of homologous chromosomes is a very important step for meiosis because the rightness

What are histogenesis and organogenesis, What are histogenesis and organoge...

What are histogenesis and organogenesis? Histogenesis is the procedure of tissue formation in the embryonic development. Organogenesis is the process of organ formation. Before

Structure of mitochondria, STRUCTURE Mitochondria is a double unit memb...

STRUCTURE Mitochondria is a double unit membranous structure. It consists of outer & inner membranes. Outer membrane is smooth & made up of lipoproteins. It bears m

Tracheostomy care, Tracheostomy Care A tracheostomy is an external ope...

Tracheostomy Care A tracheostomy is an external opening made into the trachea in order to provide an artificial airway (an opening is made in the 2nd and 3rd or 4th trach

History of viruses, In the early days of microbiology, the disease producin...

In the early days of microbiology, the disease producing submicroscopic agents were termed as 'filterable viruses' because of their ability to pass through conventional filters whi

Define polysaccharides (dp: > 9) - carbohydrates, Define Polysaccharides (D...

Define Polysaccharides (DP: > 9) - carbohydrates? Polysaccharides are high molecular weight polymers of monosaccharide units formed by glycosidic bonding. They may be long unbr

Define promoting food security to control under nutrition, Define Promoting...

Define Promoting food security to control under nutrition? Public distribution of food grains through a network of ration shops, particularly to reach the population below the

Predominantly affects of gout disease, Q. Predominantly affects of gout dis...

Q. Predominantly affects of gout disease? The disease predominantly affects males after the age of 35 years. Gout starts suddenly with an arthritic pain in the big toe and may

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd