There are over 100 different virus types in this group.

It is generally not possible to identify the virus type through symptoms.

This type of virus may be transmitted even if the symptoms are not yet present.

There are three types of virus and Type 2 was eradicated in 1999.

Until recently, however, humans rarely became infected with this type of virus.

Of course this type of virus would be discovered before too long.

Antibodies are highly selective and attack only one type of virus.

These tests can show what type of virus is causing encephalitis.

A unique fact about cervical cancer is that most cases are triggered by a type of virus.

"And in their work, they had access to all types of virus and bacteria?"