On 11 July 2008, a Dutch woman died of Marburg haemorrhagic fever, a serious illness caused by the Marburg virus, which she had contracted in Uganda during a visit to a bat cave. Three weeks have passed since people last came into contact with the patient. One can become ill up to 21 days after being in contact with a Marburg patient. A hundred and thirty people who had been in contact with the patient during the infectious period were asked to check their body temperature twice a day. They no longer need to do this now. None of the people monitored have been infected with the Marburg virus.