--%>
Assignment Help - homework help

A long enduring vaccine is not against common cold subsist

Why doesn't a long enduring vaccine against common cold subsist yet?

E

Expert

Verified

Viruses which present a high mutation rate such as the virus which causes the common cold escape simply from the action of vaccines against them. Subsequent to a primary immune response (that is, natural or artificially induced) against virus in the subsequent season of infection new mutant resistant strains emerge and the protection received with the immune response of last season is lost. (That is, one could state that the high mutation rate is a form of ‘immunization’ found by such viruses.)

   Related Questions in Biology

  • Q : Define Applications Development

    Applications Development: It is a programming language and related utility programs which permit for the creation, development and execution of application programs. Most of the database management systems (DBMSs) comprise a complete application devel

    		•
  • Q : Describe vision Describe vision ? Why

    Describe vision? Why is vision significant for life on earth?

    		•
  • Q : International Arena - Organizational

    A final major reason for the emerging challenge of diversity is that more and more organizations are entering into international arena. A natural by-product of going international is increased diversity, in this case cultural diversity. Of domestic organizations have and promote diversity then, a

    		•
  • Q : Describe Return Purchase Order or PO

    Return PO (Purchase Order): It refers to the refusal of purchase order through the purchase manager, prepared by the respective department to achieve uninterrupted supply of production chain at their end. It can be

    		•
  • Q : Neoplastic tumors acquire nutrients and

    How do cells of the neoplastic tumors acquire nutrients and oxygen and release wastes?

    		•
  • Q : Consistent Traits and Attributes -

    An individual's personality is commonly thought to be both consistent and enduring. The stable nature of personality suggests that it is unreasonable for marketers to attempt to change consumers' personalities to conform to certain

    		•
  • Q : What are Elisa tests What are Elisa

    What are Elisa tests?

    		•
  • Q : How is nervous system of nematodes

    Describe how is nervous system of nematodes managed? Name the place where neural chords are situated in their body?

    		•
  • Q : External rigid carapace of arthropods

    Name the external rigid carapace of arthropods termed? Of which substance it is made up? Which kind of organic molecule is that substance?

    		•
  • Q : Define the term immunity Define the

    Define the term immunity. Briefly illustrate it.

    		•