Sewwandi Bandara

  • e-mail:palihana.rallage.chathurika.sewwandi.bandara.s8[at]dc.tohoku,

Research topic

Modeling of Infectious Diseases caused by airborne transmissions

Research abstract

The airborne microbes (e.g., viruses) can be subjected to transformations when transporting from the source of emission (e.g. cough or sneeze) as respiratory droplets through the ambient environment. Such microbes can be biologically inactivated due to extrinsic factors such as heat, UV radiation, pH changes, chemical reactions in the atmosphere etc. The current research study is focused on assessing the dynamics of airborne viruses in indoor environments depending on humidity and temperature. Furthermore the study detects the inactivity rates of the virus under different humidity and temperatures using the Susceptible-Infected -Recovered (SIR) model.

 Academic backgrounds

2015 – 2019: Bachelor of Science First Class Honours, Faculty of Science, University of Kelaniya, Sri Lanka


  1. COVID-19 case prediction via wastewater surveillance in a low prevalence urban community: A modeling approach
    Yifan Zhu, Wakana Oishi, Chikako Maruo, Sewwandi Bandara, Mu Lin, Mayuko Saito, Masaaki Kitajima, Daisuke Sano
    Journal of Water and Health, February 2022, 20(2), 459-470.

 Conference presentations

  1. Transmission dynamic modeling and determination of effective control measures for COVID-19 in indoor environments
    P. R. C. Sewwandi Bandara, Syun-suke Kadoya, Daisuke Sano
    The 4th GSES Forum
    GSES main building, Tohoku University (Oct 28, 2022)
  2. Inferring the effectiveness of non-pharmaceutical interventions against COVID-19 in an evacuation center
    Sewwandi Bandara, Syun-suke Kadoya, Daisuke Sano
    Water Environment and Technology Conference Online 2021(WET2021)
    Aug. 11-12, 2021.


  1. Professional Master for Sustainable Environment Award at the International Environmental Leadership Program (IELP-PMSE Award)
    Graduate School of Environmental Studies, Tohoku University
    Sep. 24, 2021.