Respiratory virus shedding in exhaled breath and efficacy of face masks

This study was undertaken in an outpatient clinic of a private hospital in Hong Kong between March 2013 and May 2016, and has just recently been published in Nature Medicine.  A total of 111 patients infected with human coronavirus (n=17), influenza virus (n=43) and/or rhinovirus (n=54) (three participants had coinfections) formed the focus of theContinue reading “Respiratory virus shedding in exhaled breath and efficacy of face masks”

Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room

Bioaerosols are generated during wastewater treatment (eg Wang et al., 2018) and personnel working in public are also at risk of infection through inhaling aerosolised virus. This study describes the working efficacy of a N95 respirator mask (left image) or a surgical mask (right image). The Experiment: A mechanical dummy which coughed infectious influenza virusContinue reading “Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room”

Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask

This study gives information about surgical mask containment of particles coughed out by an infected person and is relevant to personnel who have to work amongst potentially infectious members of the public who may or may not be wearing masks. In this study a dummy of a 70kg man enclosing a mechanical lung model forContinue reading “Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask”