International travel and health : situation as on 1 January 2012 with 2015 and 2016 updates - Geneva : World Health Organization, 2016.


chi.

WHODOC

9789241580472 (English version, 2012) 9787502643416 (Chinese)


Communicable disease control.
Travel.
Vaccination--standards.
Risk factors.

WA 110 2016IN