 Today, ICOH is the world's leading international scientific society in the field of occupational health with a membership of 2,000 professionals from 93 countries and is recognised by the United Nations as a non-governmental organisation (NGO) with close working relationships with ILO, WHO, UNEP and ISSA.The most visible activities of ICOH are the triennial World Congresses on Occupational Health, which are usually attended by some 3,000 participants.The 2000 Congress was held in Singapore, the 2003 Congress in Iguassu Falls (Brazil), the 2006 Centennial Congress in Milan, (Italy), the 2009 Congress in Cape Town (South Africa), ICOH 2012 Congress in Cancun (Mexico), ICOH 2015 Congress in Seoul (Rep. of Korea), while ICOH 2018 was held in Dublin (Ireland).