Fig. 1From: What does soil-transmitted helminth elimination look like? Results from a targeted molecular detection survey in JapanHistorical trend map of Ascaris egg-positive percentage among elementary school children. Ascaris egg-positive percentages in 1960, 1966 and 1973 are represented in gray scale. These maps were created using statistical data from the Ministry of Education, Culture, Sports, Science and Technology, Japan [18,19,20] and the website Hakuchizu nurinuri (https://n.freemap.jp), which provides copyright-free maps. The maps were then edited with Adobe Photoshop version CS 5.1Back to article page