Evaluation of short-distance airborne infection risk using a cough generator

Wei Ling*, Maho Ichikawa, Kaho Hashimoto, Masayuki Ogata, Hitomi Tsutsumi, Shoichi Morimoto, Tanabe Shin-Ichi, Satoshi Hori


研究成果: Conference article査読

1 被引用数 (Scopus)


Short-distance airborne infections are often thought to occur by large droplets or direct contact. Recent studies have investigated the phenomenon of short-range airborne infection. In this study, the effect of relative humidity and short-distance exposure to cough droplet nuclei were evaluated. The evaluation model for infection risk was designed based on experimental data and previous studies and included sampling efficiency and virus survival rate. As observed in the comparison between short-range exposure and long-range exposure, the short-range exposure to the droplet nuclei by one cough was equivalent to a long-range exposure of several seconds to, depending on the number of ventilations, even for a momentary high-concentration exposure. This suggests the possibility of an infection risk corresponding to the receiving condition. Since short-range exposure and long-range exposure have different factors affecting the risk of infection, it is suggested that effective infection control should be selected for each condition. The risk of infection due to long-range exposure is considered to be sufficiently reduced to that of a single cough if the building meets the necessary number of ventilations. It was suggested that the influence of relative humidity on infection risks is smaller than other factors such as ventilation.

ジャーナルE3S Web of Conferences
出版ステータスPublished - 2019 8月 13
イベント13th REHVA World Congress, CLIMA 2019 - Bucharest, Romania
継続期間: 2019 5月 262019 5月 29

ASJC Scopus subject areas

  • 環境科学(全般)
  • エネルギー(全般)
  • 地球惑星科学(全般)


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