<Li> Visa on arrival is issued free of charge . </Li> <Tr> <Td> Sierra Leone </Td> <Td> Visa required </Td> <Td> </Td> <Td> <Ul> <Li> International Certificate of Vaccination required . </Li> </Ul> </Td> </Tr> <Ul> <Li> International Certificate of Vaccination required . </Li> </Ul> <Li> International Certificate of Vaccination required . </Li>

When do us citizens need visas for eu