Understanding the Concept of Viruses

For the first fifty years of the twentieth century, there was absolutely no

agreement on what a virus actually was.

Some researchers thought it was a liquid poison.

Others thought it was a tiny, invisible bug.

Some argued it was a chemical molecule, while others insisted it was a form of

life.

The only thing they agreed on was that they couldn't see it,

and they couldn't

isolate it.

A historian of science named William Summers wrote a paper in twenty

fourteen that really blows the lid off this whole situation.

He asked a very simple question:

How did microbiologists invent the category of virus as we know it?

Notice the word invent.

He points out that a virus is basically whatever a virologist says it

is at any

given time. It is not a fixed natural object like a

rock or

a cat. It is a concept that changes based on the trends and

technology of the era.

Summers admits that the concept has been unstable and evolved not because

they found more facts, but because they kept changing the

definition to keep the

theory alive.

This constant shifting of the goalposts became necessary because the early

experiments were a total mess.