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

How does the study of fossils strengthen theory of evolution, How does the ...

How does the study of fossils strengthen the theory of evolution? The study of fossils reveals extinct and ancient species having many similar structures to others of the prese

Collection of plant specimens, Q. Collection of plant specimens? Collec...

Q. Collection of plant specimens? Collection of plant specimens is essential for taxonomic research. These circumscribe species and document their variability. Plant material i

Determine the significance of mesoglea, Determine the significance of Mesog...

Determine the significance of Mesoglea. The jellylike layer found between endodermal and ectodermal cell layers of diploblastic organisms. It acts as a type of cement holding t

Help, A climate classification system divides regions according to _____?

A climate classification system divides regions according to _____?

Explain about rheumatic heart disease, Q. Explain about Rheumatic Heart Dis...

Q. Explain about Rheumatic Heart Disease? Rheumatic Heart Disease (RHD) is a very common cause of cardiovascular disorder in children and adolescents in India. This disease inv

What is ceramics, What is Ceramics A kind of material that is "bone lik...

What is Ceramics A kind of material that is "bone like" based on the specific ratios of calcium and phosphorous in particular crystalline structures. Ceramics are inorganic, no

Show the characteristics of honey, Honey comes under the purview of Prevent...

Honey comes under the purview of Prevention of Food Adulteration Act (PFA). Due to its limited production and high cost, honey is prone to adulteration by cane sugar, invert sy

Explain glucocorticoids, Explain Glucocorticoids The adrenal cortex se...

Explain Glucocorticoids The adrenal cortex secretes the glucocorticoids which  increase gluconeogenesis by increasing hepatic intake of amino acids accompanied by increased ac

Define feeding and nutritional management of spinal trauma, Define the Feed...

Define the Feeding and Nutritional Management of spinal trauma? The main objectives of nutritional management are to meet the nutritional needs of the initial acute phase and

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