Page 274 - PRACTICE EXAMS FOR YDT

YDT/İNG

0 ----
- 1
e o as a a s ee a a ardous
illness
The genetic variety among humans causes a wide
range of responses to epidemic illnesses. Also, B) immunisation methods are always evolving
human bodies are kept healthy and protected
from invading infections thanks to the extensive C) anyone who has had measles will not develop
diversity of cell types and chemicals that make up chickenpox
their immune systems. As a consequence of this,
some individuals are able to develop immunity to D) individuals may react differently to various
some particular illnesses, while others only have illnesses
a partial immune response, and still others do not E) measles was formerly a far more serious illness
have any immunity. It is possible to be immune to than it is now
one illness while being vulnerable to another, and
so e ases su as t t e ue a v rus
protection is merely short-lived. Furthermore,
certain illnesses, like measles, may equip patients
with lifelong immunity, and some illnesses, like
rheumatic fever and chickenpox, may infect a
person at a young age and then lie dormant for an 1 ----
extended amount of time before becoming active A) every individual is immune to a certain type of
again in another form. illness

B) human immune system features are
determined by their genetic make-up

ue a a e o e o t e ost re ue t
T ----
illnesses around the world
A) the many forms of immunities present in
humans D) everyone is now immune to measles due to
medical advances
B) how to build up the immune systems of
humans E) no one is immune to illnesses that are hidden
in their body
C) the causes of acquired immune deficiency
syndrome

D) how to achieve permanent immunity to specific
illnesses

E) the causes of the genetic diversity of humans

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