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

Branches of Biology, Is pathology a subspecialty of zoology or botany?

Is pathology a subspecialty of zoology or botany?

Lysosomes, Lysosomes Lysosomes are small vesicles which are bounded ...

Lysosomes Lysosomes are small vesicles which are bounded by a single membrane & contain hydrolytic enzymes in the form of minute crystalline or semi crystalline granules of

Are the extraembryonic membranes the same in all vertebrates, Q. Are the ex...

Q. Are the extraembryonic membranes the same in all vertebrates? The presence of each extraembryonic membrane differs according to the vertebrate class. In amphibians and fi

Needle and sharp instrument safety, Needlestick/sharp instrument injuries a...

Needlestick/sharp instrument injuries are of major concern to health care workers. All of the significant exposures reported in the academic year 2003/04 in our Faculty, were injur

Difference between spermatogenesis and oogenesis, DIFFERENC E BETWEEN SPER...

DIFFERENC E BETWEEN SPERMATOGENESIS AND OOGENESIS - S.NO . SPERM A T OGENESIS OOGENESIS 1.   2.   3.

Microbiology, control of microorganisms by chemical method.

control of microorganisms by chemical method.

Chromosomes, how many arrs are present in mataphasic telocentric chromosome...

how many arrs are present in mataphasic telocentric chromosomes

Explain absorption and metabolism of minerals, Explain Absorption and Metab...

Explain Absorption and Metabolism of Minerals? All minerals in the diet are not equally absorbed. Also different compounds and complexes of same mineral are absorbed with diffe

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