AIDS is characterised by a sharp reduction is
Helper $T-$ cells
Killer $T-$ Cells
Suppressor $T-$ Cells
$B-$ lymphocytes
It’s obvious.
Melanin and lewy bodies occur in the neurons in case of
Chagas disease is caused by
Cocaine interferes with the transport of the neuro-transmitter ………
Study of interaction of antigens and antibodies in the blood is
A chemical substance produced by a microorganism for inhibiting the growth of another is
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