The presence of the $HIV$ virus was first reported in:

During the replication of a retrovirus,what is introduced into the host cell?

What is the correct sequence of events that occur after $HIV$ infection in a human body?
$(I)$ Viral $DNA$ enters the host $DNA$
$(II)$ Entry into $T_H$ lymphocytes and replication
$(III)$ Viral $RNA$ is converted into viral $DNA$ by reverse transcriptase
$(IV)$ $HIV$ enters into macrophages
$(V)$ Destruction of $T_H$ lymphocytes
$(VI)$ New virus particles are produced from the host cell

Spread of $AIDS$ does not occur through

At which stage of $HIV$ infection do the symptoms of $AIDS$ appear?

The $AIDS$ test is known as