We urge pilgrims to consult a doctor without delay if they become ill within 14 days after their return.
The number of cases infected with the MERS-corona virus has recently increased. Some cases have also been reported close to home, but these are import cases after a recent stay in the Middle East.
Extra measures are in effect to avoid the spread of the polio virus.
The news that one yellow fever vaccination offers lifelong protection may have caused some misunderstanding.
Read 'How to travel and stay healthy' first