Flu vaccines take months to make. Here's what could speed it up

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For decades, the flu virus in the shots you’re offered every fall has been grown in chicken eggs.

While that may sound odd, the tried-and-true technology has been around since the 1940s. Now, scientists are trying more modern methods of developing vaccines.

It’s not a diss against the millions of hens and their eggs that go into making influenza vaccines for the world every year, because the system does work, experts say. But supplies can run short, and eggs can cause problems that researchers are making progress on solving.

Twice a year, the World Health Organi