A Brief Guide to What is a Viral Disease
What exactly are viruses? Viruses are basically biological entities which exist virtually everywhere in the world. They’re found in plants, animals, and many other living things, and sometimes they can cause fatal infections. A virus can also affect only one organism in one way while another one in a totally different way. This explains how a virus which causes infection in a dog might not effect a person.
Because of their size, viruses are made up of living cellular structures that have their own set of DNA. These DNA strands usually come from a virus’ host cell, but sometimes they also come from the genes of the cells themselves. The DNA of the virus and its host cell is much smaller than the nucleus of each cell.
The major difference between a virus and an organism is that an organism only has one life cycle, whereas a virus has several life cycles. When a virus replicates within its host cell, it divides into two parts before it dies down. One part of the virus becomes inactive while the other begins to reproduce itself, producing a new copy of the virus. These divisions continually occur throughout the life cycle of the virus.
Although a lot of people have heard of a few well-known flu viruses like the ” Influenza,” few people realize the fact that there are other kinds of viruses out there. These types include “HIV”, ” TB,” as well as ” Epstein-Barr.” The term “influenza” actually refers to a single kind of virus, but there are several different types out there. Among these different types of viruses, there are the seasonal viruses which cause colds or allergies during certain seasons; the anthrax viruses which cause the deadly anthrax disease; and the herpes viruses, which are responsible for transmitting the herpes virus to those who are not infected with it.
The major characteristic of all viruses, other than their life cycles, is that they require something to replicate. This replication process is often done within the body of the virus, or on the surfaces of the infected cells. For instance, the SARS virus replicates itself by entering the body through an opening in the nose. It then makes copies of itself on various parts of the body it intends to attack. The point is that a virus needs to reproduce in order to spread.
A natural virus needs to enter its target cell and then replicate within that particular cell (for instance, the SARS virus spreads from the nasal cells into the blood stream). Natural viruses also need to take advantage of their hosts’ metabolism in order to multiply themselves. For this reason, natural viruses tend to be short and have a fairly short life cycle. Therefore, they cannot circulate for very long.