‘Itaria-itaria' disease is caused by

Identify $X$ and $Y$ from the following structure

Infantile amaurotic idiocy $(Tay-Sachs disease)$ is

Interferons are

Amnesia is

$A$ : $A$ person who has received a cut accidentally and is bleeding needs to be given anti-tetanus treatment.
$R$ : Anti-tetanus injection provides active immunity by providing preformed antibodies for tetanus.