Virus Suspected of Shrinking the Heads of Brazilian Babies Arrives in Puerto Rico
After prompting Brazilian officials to worry that it was causing babies to be born with abnormally small heads and brains, the Zika virus has turned up in Puerto Rico. The Centers for Disease Control and Prevention has issued a travel advisory.
Climate Change Is Helping to Spread Deadly Viruses
As average, global temperatures increase, animals are moving into new habitats, carrying with them deadly diseases that are increasingly infecting humans.