Gray matter of the brain is affected by

If interferon is being produced in the body of a sick person,the person is most likely to be suffering from

Common cold is not cured by antibiotics because it is

Assertion : Severe Acute Respiratory Syndrome $(SARS)$ originated in China.
Reason : China is the most populated country of the world.

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.

Which of the following pairs of diseases are both caused by viruses?