Which of the following diseases is both infectious and fatal?

Which disease is caused by a retrovirus?

Which virus directly attacks macrophages?

The presence of $HIV$ can be detected by these methods:
$(i)$ $ELISA$
$(ii)$ $WB$ $Test$ (Western Blot)
$(iii)$ $VB$ $Test$
$(iv)$ $ALISA$

Arrange the following statements regarding $AIDS$ in the correct chronological order of the infection process:
$(1)$ After entering the individual's body,the $HIV$ virus enters macrophages,where the viral $RNA$ genome replicates into viral $DNA$ with the help of the reverse transcriptase enzyme.
$(2)$ $HIV$ enters helper $T$-lymphocytes.
$(3)$ $HIV$ has an $RNA$ molecule as its genetic material.
$(4)$ Newly formed viruses are released into the blood and attack other helper $T$-lymphocytes.
$(5)$ Viral $DNA$ is incorporated into the host cell's $DNA$.

In which of the following situations is $AIDS$ $NOT$ transmitted?