Critics say Kennedy is ordering a review of childhood vaccines to stoke skepticism, risking the spread of disease.

Four of the nine key targets are behind track or face significant risks. But two are ahead of schedule.

New research reveals how seasonal diseases impact our willingness to follow health measures. People are less likely to follow ...

And rates of heart attacks and strokes can rise in winter for a number of reasons. Factors such as low temperature, less physical activity, more time spent indoors—perhaps with indoor air pollutants ...