Figure 2.
Global distribution of cases. Thirty-seven cases were collected from Asia, 13 from Americas and five from Europe. Fourteen cases were reported before 1999, 16 from 2000 to 2009 and 25 after 2010.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.