Viruses such as H1N1 (swine flu), influenza, chicken pox, measles and rubella, are actually microscopic infectious agents that use pieces of genetic material called RNA to infect a host cell and replicate. Because of their genetic build, viruses cannot be treated with antibiotics and must, instead, be treated as a highly contagious disease.
Viruses cannot multiply without a host cell and usually find suitable hosts in animals and humans. A virus enters the body of the host, attaches itself to a cell, and uses the cellular systems to multiply. Once it multiplies, it attacks other cells in the host, causing immune reactions and flu-like symptoms.
In the case of the flu, for example, a virus invades your system, attacks cells, and you experience specific symptoms as part of your body's need to rid itself of the flu virus. In its attempt to expel the microbes, you may spread more virus agents into your environment.
Although antibiotics do not work against viruses, there are some vaccines that can help prevent the spread of illness such as the flu. Flu shots, however, do not cover all strains of the virus and individuals can still fall sick from other types of influenza like H1N1.
In order to avoid catching a viral infection, consider taking the following basic precautions:
While cold and flu symptoms can be very similar, it's important to know the difference between them and treat each one accordingly. Colds, for example, are sometimes caused by bacterial infections. While these can often be contagious, they can be easily treated with antibiotics.
Symptoms arising from flu viruses are similar between the different strains. Common seasonal influenza (flu), for example, has very similar symptoms to less common strains such as H1N1 (swine flu).
Although vaccines can help prevent against some of the more frequent types of flus, it's important to know the difference between symptoms caused by regular flu and more aggressive viruses such as H1N1.


