Cold snap brings Spain lowest temperatures in 20 years

Much of Spain struggled Tuesday in the aftermath of a massive snowfall that hardened into ice amid a record cold snap that turned streets and roads into safety hazards in areas unaccustomed to extreme winters.

Zika and yellow fever—vaccines without eggs

A team led by researchers from the Max Planck Institute for Dynamics of Complex Technical Systems in Magdeburg is developing methods with which viruses for vaccines can be replicated in significantly higher concentrations ...

On-demand vaccines possible with engineered nanoparticles

Vaccines combat diseases and protect populations from outbreaks, but the life-saving technology leaves room for improvement. Vaccines usually are made en masse in centralized locations far removed from where they will be ...