Influenza, or the flu for short, is something that practically everybody has heard of, and lots of people have caught. It's a nasty cold: the flu comes with fever, aching body, and exhaustion that will last for days. Millions of people catch it annually, and the majority recover, but it can be serious in young kids, elderly individuals, and people with compromised immune systems. Luckily, the flu vaccine lowers the risk. But how much do you really know about the flu, how it spreads, and how you can protect yourself? Let's find out.
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