Measurement of Face-touching Frequency in a Simulated TrainKentaro Morita, Kaho Hashimoto, Masayuki Ogata, Hitomi Tsutsumi, Shin-ichi Tanabe and Satoshi HoriE3S Web Conf., 111 (2019) 02027DOI: https://doi.org/10.1051/e3sconf/201911102027