Katherine J. Wu

Delivering a human baby is not uniquely difficult.

They might fade, but they flap and feed with vigor until they drop dead.

Normally, the CDC's vaccine advisors weigh in on flu vaccines in June. This year, the panel is in disarray.

By responding to the Ebola outbreak independently, the U.S. is showing the limits of that approach.

One group is an outlier for gestational-diabetes risk, and no one can yet say why.

Halting the distribution of vaccines that the U.S. objects to will mean depriving kids of protection against dangerous diseases.

The outbreak will be difficult to contain, and international health organizations are scrambling to respond.

A passenger helped manage the outbreak after the ship’s doctor on the MV Hondius fell ill.

A ship is dealing with a hantavirus outbreak.

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