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Biology Paper 1
Infectious Diseases
Measles and HIV
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lora balfe
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Cards (18)
What are viruses classified as?
Pathogens
that cause
infectious disease
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Can viruses be killed by antibiotics?
No
, viruses
cannot
be killed by antibiotics
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What are the key facts about measles?
Highly infectious
disease
First symptom:
fever
Develops
red skin rash
after
three days
Spread through
droplets
from coughs or sneezes
Can cause
serious complications
Most
children
are
vaccinated
against it
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What is the first symptom of measles?
A
fever
or very high
temperature
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How is measles spread?
Through
droplets
when an
infected
person coughs
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What can happen if measles complications develop?
They can damage the
breathing
system or brain
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What is the vaccination status of most children regarding measles?
Most children are
vaccinated
when
young
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What are the key facts about HIV?
First symptom:
flu-like
illness
Symptoms disappear after one or two weeks
Virus attacks
immune system
cells
Immune system becomes severely damaged
Can lead to late stage HIV or AIDS
Treated with
antiretroviral
drugs
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What is the first symptom of HIV?
A
flu-like
illness
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What happens to the immune system over time with HIV?
It becomes
severely
damaged
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What can occur when the immune system is severely damaged by HIV?
Patient can easily contract other
infections
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What is the role of antiretroviral drugs in HIV treatment?
They stop the
virus
from multiplying
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Are antiretroviral drugs a cure for HIV?
No
, they are
not
a
cure
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How is HIV transmitted?
Through
exchange
of fluids between humans
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How can HIV be spread among drug users?
By sharing
infected
needles
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What can happen at the late stage of HIV or AIDS?
Patient may develop
cancer
or infections
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What is the outcome for patients taking antiretroviral drugs?
They can lead a normal
life expectancy
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What are the symptoms and complications of measles and HIV?
Measles
:
Fever
Red skin rash
Serious complications possible
HIV:
Flu-like illness
Immune system
damage
Risk of
infections
and cancer
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