UN chief criticises restrictions as Ebola travel hurdles mount

"The best ways to stop this virus is to stop the virus at its source, rather than limiting and restricting the movement of people and trade," UN Secretary General Ban Ki-moon said in Vienna. 

World Health Organisation (WHO) officials have been pointing out that the negative economic consequences that such policies have for the most affected countries of Guinea, Liberia and Sierra Leone far outweigh any small and unproven protective effects that travel restrictions might have. Singapore's Minister of State for Health Lam Pin Min said his country would impose visa requirements on citizens from these three countries from Wednesday, local media reported.