What You Should and Shouldn't Worry About: Putting Avian Flu in Perspective: Weekend - Yahoo! Finance
The worry isn't today's bird flu but what it might become tomorrow. We already know this flu is deadly, killing about half the people who catch it. The fear is that it will become more contagious, which could happen if it mutates or combines with a human virus. The risk is especially worrisome as infected birds migrate to Africa. There people live in close quarters with animals and a large percentage of the population has HIV, possibly making them more vulnerable. All of this increases the risk that bird flu will combine with a human virus, and once that happens, the disease will likely spread quickly.
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