The caustative organism of $AIDS$ spreads by
Sharing infected needles and syringes
Transfusion of infected blood
Unsafe sexual relationships
All of these
Damage to thymus in a child may lead to
Assertion : Histamine is involved in allergic and inflammatory reactions.
Reason : Histamine is a vasodilator.
The study of worms which cause parasitic infestations in man is called
Cholera patient is administrated by ’saline drip' because