Most residents of the Netherlands born after 1950 were immunised during their childhood against diphtheria, tetanus and polio as part of the Dutch Immunisation Programme. However, the agents that cause these diseases are still prevalent in many other countries. Re-vaccination is advisable for people travelling to one of these countries if the previous vaccination was given more than ten years ago.
Ebola hemorrhagic fever is one of many known haemorrhagic fevers. They are serious, often fatal diseases in humans and primates (including, amongst others, chimpanzees and gorillas). Ebola hemorrhagic fever is caused by infection with the Ebola virus. Symptoms begin quite abruptly, sometimes as soon as two days after first contact with the virus. The Ebola virus was discovered during an outbreak in 1976 in the current DR Congo, along the River Ebola. The reservoir of the virus is unknown, but bats appear to play a major role in the spread of the disease.
Enterovirus EV-71 is a viral disease, characterized by high fever, rash and in many cases blisters in mouth, hands and feet. That is why the disease is also known as hand-, foot- and mouth disease. Normally it runs a mild course but occasionally it may course pneumonia or brain symptoms.
Japanese encephalitis is a viral infection spread by mosquitoes. Only a small proportion of infections progress to the actual disease. Infection generally occurs in rural areas and on the outskirts of cities.
Malaria is an infectious disease caused by parasites. It occurs in four forms one of which can be fatal. You can prevent this disease by protecting yourself from mosquito bites and when travelling to certain areas by taking antimalarial medications.