Viral Diseases (OCR GCSE Biology A (Gateway Science Suite)): Flashcards

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Viral Diseases
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Why viral diseases can't be cured

No medicines developed yet to cure them

Main measles symptoms

High fever & red skin rash

Measles complications

Pneumonia, encephalitis, blindness

How measles spreads

Droplet infection (coughs/sneezes)

Measles prevention method

Vaccination

Initial HIV symptoms

Flu-like symptoms

What HIV attacks

Immune system

What AIDS stands for

Acquired Immunodeficiency Syndrome

How HIV is transmitted

Sexual contact or exchange of bodily fluids

Ways to prevent HIV spread

Use condoms, don't share needles, screen blood

What antiretroviral drugs do

Slow virus replication & prevent progression to AIDS

TMV symptoms in plants

Discolouration of leaves

How TMV spreads

Contact between plants; insects as vectors

TMV prevention methods

Good field hygiene, pest control, resistant strains

Effect of TMV on photosynthesis

Affected leaf areas cannot photosynthesize

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