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How the Flu Spreads: Swine Flu Explained
Learn how flu viruses like the 2009 'swine flu' spread from person to person through coughs and sneezes, the symptoms they cause, and why most healthy people recover.
How it works
- Press play to start the video.
- Videos 5 minutes or longer pause once or twice for a quick check. Get it right and you're on your way. If not, you'll see a friendly explanation and the video simply keeps going. Short videos skip the checks.
- At the end there's a 3-question test. Score 60% or more to complete the lesson, and 80% or more to master it. You can always watch again and try for a higher score.