Sept 5 (Reuters) – International agencies and governments are struggling to contain the world’s worst epidemic of the Ebola hemorrhagic virus, which has killed over 1,900 people in West Africa. Here is a timeline of the main developments in the outbreak. March 22 – Guinea confirms that a previously unidentified hemorrhagic fever, which killed over 50 people in its southeast Forest Region, is the Ebola virus. One study traces the suspected original source to a 2-year-old boy in