English, 06.05.2020 07:24, boxergirl9875

Now scientists are working on vaccines to fight the deadly bird flu H5N1. But these vaccines aren't easy to make. One reason is that the flu virus often mutates. So a vaccine that worked against the flu last year won't protect you very well this year.

Another problem is that it takes years of tests to make sure bird flu vaccines will work on humans without making them sick.

In 2005, a study began testing a possible bird flu vaccine on 450 people. The vaccine uses a type of bird flu that was found in Southeast Asia in 2004. Some of the early results are promising. But as of spring 2007, there is still no vaccine available for H5N1.

—When Birds Get Flu and Cows Go Mad!,
John DiConsiglio

Explain the challenges scientists face with mutating viruses and how they are trying to solve the problem.

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Now scientists are working on vaccines to fight the deadly bird flu H5N1. But these vaccines aren't...