Long-lasting vaccines for common cold
Explain why there are no long-lasting vaccines developed for the common cold?
Expert
Viruses which have a high mutation rate such as, the virus which causes the common cold generally escape easily from actions of the vaccines against them. After primary immune response against the virus within the next season of the infection new mutant resistant strains occurs and protection that is achieved with the immune response of last season gets lost.
Briefly write a note what the System Engineering Model achieves?
Briefly illustrate the kinds of software maintenance?
Does the length of time which a site or domain name has present play in the search engine placement?
For software testing which group of teams is used?
Describe the demerits of Waterfall Model?
Briefly explain what does 301-server response code indicates: (1) Not Modified. (2) Moved Permanently. (3) Syntax error in request. (4) Payment is needed. (5) The request should be authorized before it can occur. C
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