Diphtheria is caused by
Poisons released by living bacterial cells into the host tissues
Poisons released from dead bacterial cells into the host tissues
Poisons released by virus into host tissues
Excessive immune response by the host's body
A new born baby who receives $IgA$ form its mother's milk develops
$HIV$ decreases natural immunity of the body by
Recurrence of high temperature in malaria at intervals is due to completion of
AIDS is caused by HIV that principally infects
Which one of the following pairs of disease can spread through blood transfusion