Lesson 6 ·Class 9 · Diseases : Cause and Control · Match Lab
Viral Diseases
What a virus does, and how each one spreads.
Match each viral disease to how it spreads and what it affects.
Matched 0/7
Free play — tap an item on the left, then its partner on the right; each link tells you why. Switch to when you're ready to test yourself.
Sort them by route in your head: blood-borne (AIDS, hepatitis B), airborne (chicken pox, COVID), water-borne (polio), animal bite (rabies).
What this lesson covers
Challenges to clear
- Match every disease.
- Connect ''antibiotics will not help'' to the reason why.
The task
Match each viral disease to how it spreads and what it affects.
What this lesson covers
- AIDS — HIV destroys helper T-cells, so immunity collapses; spread by blood, sexual contact and mother to child (Death usually comes from other infections the weakened body can no longer resist.)
- Chicken pox — Spread by droplets and contact; itchy fluid-filled blisters over the body (Highly contagious; the same virus can reappear later in life as shingles.)
- Hepatitis B — Spread by infected blood and needles; attacks the liver (Preventable by vaccine, unlike hepatitis A which spreads through water.)
- COVID-19 — Spread by respiratory droplets and aerosols; affects mainly the lungs (Masks, distancing and ventilation all target droplet spread.)
- Poliomyelitis — Spread by contaminated water; attacks motor nerves and can paralyse (Oral polio vaccine has driven it almost to extinction.)
- Rabies — Spread by the bite of an infected animal; attacks the nervous system (Almost always fatal once symptoms start, so vaccination straight after a bite is essential.)
- Why antibiotics do not work on these — Viruses have no cell wall or bacterial machinery for the drug to attack (They multiply inside our own cells, which is what makes them so hard to treat.)
Hint
Sort them by route in your head: blood-borne (AIDS, hepatitis B), airborne (chicken pox, COVID), water-borne (polio), animal bite (rabies).