@CNN: High-population cities have longer-lasting flu seasons, while lower-population cities have shorter but more intense seasons, new research suggests. But don’t assume you’re safe if you live in a smaller city. https://t.co/Ut29R0Rzo1

@CNN: High-population cities have longer-lasting flu seasons, while lower-population cities have shorter but more intense seasons, new research suggests.

But don’t assume you’re safe if you live in a smaller city. https://t.co/Ut29R0Rzo1