Viral vaccines and treatments are difficult to develop and m

Viral vaccines and treatments are difficult to develop, and many viral diseases currently have no vaccine or treatment. Given what you know about DNA and viruses, offer an explanation for these challenges.

Solution

Viruses are biologica agents containing a genetic matetial in the form of DNA or RNA which i sorrounded by protien coat. Viruses continously keep on chaging their surface protiens as a result of which they undergo mutation ad variations in a quick sucession of time. It is due to this reason that new strinspf viruses are emerging very fast due to quick mode pf mutation. Because they contantly change their surface protiens , it is very difficult to desgn an effective vaccine against viruses.

Designing safe and effective antiviral drugs is difficult, because viruses use the host\'s cells to replicate. This makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism\'s cells. Moreover, the major difficulty in developing vaccines and anti-viral drugs is due to viral variation.

Vaccines are very effective on stable viruses, but are of limited use in treating a patient who has already been infected. They are also difficult to successfully deploy against rapidly mutating viruses, such as influenza and HIV.