A multilateral international sanitary convention was concluded at Paris on 17 January 1912. This convention was most comprehensive and was designated to replace all previous conventions on that matter. It was signed by 40 countries and consisted of 160 articles. Ratifications by 16 of the signatories were exchanged in Paris on 7 October 1920. Another multilateral convention was signed in Paris on 21 June 1926, to replace that of 1912. It was signed by 58 countries worldwide and consisted of 172 articles.