Antigua and Barbuda , Belize , Canada - The authorities on 31 October suspended the issuance of visas to travellers who have recently visited West African countries affected by the Ebola virus. The action covers those who have travelled to Guinea, Liberia and Sierra Leone in the past three months, Colombia imposed an entry ban from 14 October on any traveller who has visited Guinea, Liberia, Nigeria, Senegal or Sierra Leone in the past four weeks. The restriction would also reportedly apply to Colombian nationals. The Dominican Republic has banned entry to travellers who have been in the following countries in the past 30 days: Sierra Leone, Senegal, Liberia, Guinea, and Nigeria, as well as any countries that the World Health Organization has deemed to be affected by the Ebola virus. Guyana announced on 16 October that visas will not be issued to nationals from Guinea, Liberia, Sierra Leone and Nigeria. Furthermore, health officials will screen travellers who have visited these countries in the six weeks prior to their arrival in Guyana. Haiti has banned (PDF) entry to travellers who have been to Guinea, Liberia or Sierra Leone in the past 28 days. Travellers who have been to these countries more than 28 days before travel to Haiti must present a government-certified health certificate and the results of a blood test for the Ebola virus upon arrival. It is uncertain at this time how these measures will be carried out or enforced. International SOS is monitoring the situation. Jamaica imposed an entry ban from 16 October for travellers arriving from Guinea, Liberia and Sierra Leone, as well as those who have visited these countries within the four weeks prior to their arrival. In addition, any Jamaican national who travels to the aforementioned countries will be quarantined for 28 days on return. Panama on 22 October banned the entry of travellers who have visited Guinea, Liberia and Sierra Leone in the past 21 days. The ban will remain in place until the three countries are declared Ebola-free. St Kitts and Nevis have restricted the entry of nationals from Guinea, Liberia and Sierra Leone. Similar measures will also be applied to travellers who have visited these countries in the 21 days prior to arrival. St Lucia has banned visitors from Guinea, Liberia and Sierra Leone. The government has also announced that, in addition to a visa, visitors from Nigeria will be required to present a recent medical certificate clearing them of the virus. No further details are available at this stage, though we are investigating further. St Marteen has said that visitors who have travelled to, from or through Democratic Republic of Congo, Guinea, Liberia and Sierra Leone in the past 21 days will be denied to enter or transit the country. Individuals returning from the above countries who live in St Maarten will be allowed to enter on condition that they agree to be quarantined for at least 21 days upon arrival. St Vincent and the Grenadines has banned visitors from Guinea, Nigeria and Sierra Leone. Suriname has banned entry to foreign travellers who have been to Guinea, Liberia and Sierra Leone in the past 21 days, unless they can present an ‘internationally recognised health certificate’ clearing them of the virus. No further details are available at this time. Trinidad and Tobago announced on 16 October that it would deny entry to nationals of Congo (DRC), Guinea, Liberia, Nigeria and Sierra Leone. In addition, travellers who have visited any of the aforementioned countries in the past six weeks will be quarantined for 21 days upon arrival. The United States announced that beginning 22 October, any passengers beginning their travels in Liberia, Sierra Leone or Guinea will only be able to enter the country through the following airports: JFK International Airport (JFK, New York state), Newark International Airport (EWR, New Jersey), Dulles International Airport (IAD, Washington, DC), Hartsfield-Jackson International Airport (ATL, Georgia) or Chicago O'Hare International Airport (ORD, Illinois). Others Australia has suspended the issuance of visas to travellers from Guinea, Liberia and Sierra Leone. Travellers from these countries who hold permanent visas can enter Australia if they have been quarantined for 21 days prior to arrival, while those who have received non-permanent visas and who have not departed for Australia will have their visas cancelled. North Korea has banned foreign tourists since 24 October over fears of ebola; the ban applies to all entry points and border crossings. All other visitors will reportedly be required to spent 21 days in government-supervised quarantine, regardless of their country of origin or point of departure. Singapore : The authorities have announced that 5 November onwards nationals of Guinea, Liberia and Sierra Leone will require visas to enter the country. The government also said that nationals of the three countries, as well as citizens of Congo (DRC) and Mali, will be screened for fever at all entry points. Other travellers who have visited these countries recently will also be screened.