Cheng Kang, Zou Changhua, Biomedical Infophysical Models of Filtering Ghost Airflows by Wearing Masks and Maintaining Social Distancing to Prevent COVID-19 and Reopen All Systems after Shutdowns (Lockdowns), Journal of Public Health International, Volume 2, Issue 4, 2020, Pages 26-39, ISSN 2641-4538, https://doi.org/10.14302/issn.2641-4538.jphi-20-3426. (https://openaccesspub.orgjphi/article/1382) Keywords: filtering; ghost airflows; covid-19; air-conditioningļ¼Œreopening; open systems; virtual person; mask-wearing; social distancing; virus droplet; Newton; Fick; air gusts; waves