Patents are designed to protect creations and designs, but how long a patent lasts for is dependent on a number of factors. The length of time that a patent offers protection, depends largely on what type of patent is issued and whether required maintenance fees are paid to keep the patent active. slide 1 of 6.
A viral infection is a disease that can be caused by different kinds of viruses, of which the influenza-virus is best known.
Rating Newest Oldest. Best Answer: Viral infection: Infection caused by the presence of a virus in the body. Depending on the virus and the person's state of health, various viruses can infect almost any type of body tissue, from the brain to the skin.eport Abuse. infections can be viral or bacterial, ie caused by either a virus or a bacteria. Bacteria will respond to antibiotic treatment a virus won't. The symptoms such as pain can be treated, eventually the body will fight the virus and you will get better.