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 do grasslands differ from savannas, How do grasslands differ from Savan...

How do grasslands differ from Savannas? Name the two main categories of plant forms that dominate the desert vegetation.

Determine the procedure of armamentarium, Determine the Procedure of Armame...

Determine the Procedure of Armamentarium 1. Make an impression of the mandibular ridge and pour the cast in type 3 gypsum 2. Apply separating medium and allow it to dry 3

Synthesis of citratefrom acetyl coa and oxaloacetate, Synthesis of citratef...

Synthesis of citratefrom acetyl CoA and oxaloacetate: Citrate synthase catalyses this aldol condensation reaction with the release of CoA. There are certain inhibitors to  this re

Historically what were the two main evolutionary theories, Historically wha...

Historically what were the two main evolutionary theories? The two major evolutionary theories were darwinism and lamarckism.

What are the parts of a surgical needle, What are the parts of a surgical n...

What are the parts of a surgical needle. How do you classify surgical needles The surgical needle is comprised of 3 parts: the needle point, the needle body, and the swaged (pr

Define the term - dna polymerase, Which of the following best describes the...

Which of the following best describes the reasons why the sliding clamp is able to confer processivity on DNA polymerase and not DNA primase? A. The sliding clamp coats the tem

Explain indications of root-end filling (ref) - retrofilling, Explain Indic...

Explain Indications of Root-End Filling (REF) Retrofilling a. Persistent periapical pathosis resulting from an inadequate apical seal that cannot be corrected nonsurgically,

What is osmotic pressure, What is osmotic pressure? Osmotic pressure is...

What is osmotic pressure? Osmotic pressure is the pressure formed in an aqueous solution by a region of lower solute concentration upon a region of higher solute concentration

Sexual reproduction in animals, Sexual Reproduction All metazoans, if...

Sexual Reproduction All metazoans, if or if not capable of propagating asexually, produce special cells termed as gametes. The gametes may be either male gametes or sperms or

What does fungus looks like, Q. What does this fungus looks like? Ans...

Q. What does this fungus looks like? Ans. The important characteristic features of aflatoxicosis are jaundice, cirrhosis. Long term exposure to aflatoxins could lead to

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