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(CNN) -- The worst-ever outbreak of Ebola virus is stretching the medical capacities of Guinea, Liberia and Sierra Leone -- the three West African countries hit worst by the virus -- and alarming leaders around the world.
The following countries have restrictions in place aimed at keeping Ebola out, according to International SOS.
Antigua and Barbuda
Saint Kitts and Nevis
Saint Vincent and the Grenadines
Trinidad and Tobago
Source: International SOS, November 3