Which one of the following diseases is caused by a virus?

The disease caused by viruses is

Read the given statements regarding viral diseases and identify the incorrect statements.
$(1)$ The $HIV$ virus,previously known as $HTLV$,causes infectious disease.
$(2)$ The rabies virus responsible for rabies is found in the saliva of dogs.
$(3)$ Mumps is caused by the effect of a virus on the parotid gland.
$(4)$ Herpes simplex virus causes genital herpes.
$(5)$ Gonorrhea is caused by $Neisseria$ $gonorrhoeae$.
$(6)$ Dengue is a viral disease.
Identify the incorrect statements.

'Dengue fever' is caused by

Which of the following are respiratory pathogens?

Identify the mismatched pair.