What is a Virus | What County

What is a Virus

Even people who enjoy excellent health occasionally struggle with a cold or flu – both are caused by viruses. In the case of a cold, the rhinovirus is usually the culprit, in the case of a corona infection, the SARS-CoV 2 virus or in the case of a flu, various variants of the influenza virus. However, these are only two types of a whole series of viruses that populate our world. But what exactly is a virus anyway? And how is it different from bacteria? And how can a microbe, which is one of the most primitive organisms on this planet, cause so much harm in our body? Keep reading to find out what makes viruses dangerous but also useful at the same time.

What is a Virus
What is a Virus

A virus is essentially a genetic code that is enveloped by a protein shell, the so-called capsid, either in the form of a DNA or RNA. However, unlike bacteria, a virus cannot reproduce itself because it lacks some of the crucial functions for it. For reproduction, host cells are needed, into which the virus can penetrate.

Viruses are relatively simple in structure. They consist of one or more molecules and are sometimes surrounded by a protein shell. The molecules contain the genetic material – that is, DNA or RNA – with the information about their multiplication. Unlike bacteria, viruses do not consist of their own cell, nor do they have their own metabolism. They have no energy production of their own and no possibility for protein synthesis. Therefore, strictly speaking, they are also not living beings.

Viruses are tiny, only around 20 to 300 nanometers in size. Therefore, they cannot be detected under an ordinary light microscope, but an electron microscope is required. Viruses occur in many different forms. Some viruses look almost like tadpoles with a long tail, others are round or rod-shaped.

What is virus in simple words?
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How is a virus created?
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