Two-way masking is pretty effective, but it's not sustainable. Environmental engineer and viral transmission expert Dr Linsey Marr reveals how we can fight COVID by tackling our contaminated air. This podcast is intended for US healthcare professionals only. To read a full transcript of this episode or to comment please visit: https://www.medscape.com/features/public/machine Eric J. Topol, MD, Director, Scripps Translational Science Institute; Professor of Molecular Medicine, The Scripps Research Institute, La Jolla, California; Editor-in-Chief, Medscape Linsey Marr, PhD, Charles P. Lunsford Professor, Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia Study shows cloth face coverings help protect both wearers and those nearby https://vtx.vt.edu/articles/2020/11/eng-marrmasks-1123.html You may also like: Medscape's Chief Cardiology Correspondent Dr John M. Mandrola's This Week In Cardiology https://www.medscape.com/twic Discussions on topics at the core of cardiology and the practice of medicine with Dr Robert A. Harrington and guests on The Bob Harrington Show https://www.medscape.com/author/bob-harrington For questions or feedback, please email: news@medscape.net