In Spain, a collection of severe, hospitalized patients was compared to a series of controls (defined as confirmed but mild influenza cases that were treated ambulatorily), and a number of sociodemographic and health risk factors were identified.

Why did the chicken cross the road?

Euery circumstance is full of improbabilities: Faith euermore ouerlookes the difficulties of the way, & bends her eyes onely to the certainty of the end.

A common bee will sting and kill another common bee, for cause, but when it is necessary to kill the queen other ways are employed.