Zika may have flown to Brazil in 2013

Americas Zika genomes linked to Asian strains

Airplane landing in Rio

NOT A FLYBY  International air travel likely brought the Zika virus to Brazil in mid-2013, a new study suggests.

Leandro Neumann Ciuffo/Flickr (CC BY 2.0)

The Zika virus may have hopped a ride on a 747 from Southeast Asia in 2013 to invade the Americas.