Publications de Aline Laetitia Schaub

Inactivation of SARS-CoV-2 at acidic pH is driven by partial unfolding of spike

Tamar Kohn, Aline Laetitia Schaub, Athanasios Nenes, Shannon Christa David

SARS-CoV-2, the causative agent of COVID-19, is predominantly transmitted by respiratory aerosol and contaminated surfaces. Recent studies demonstrated that aerosols can become acidic, and acidification has been proposed as decontamination method. Here, we ...

Springer Science and Business Media LLC2025

Comparative characterization of bronchial and nasal mucus reveals key determinants of influenza A virus inhibition

Tamar Kohn, Céline Terrettaz, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler

Differentiated primary human respiratory epithelial cells grown at air-liquid interface have become a widely used cell culture model of the human conducting airways. These cultures contain secretory cells such as goblet and club cells, which produce and se ...

American Society for Microbiology2025

Dependence of aerosol-borne influenza A virus infectivity on relative humidity and aerosol composition

Tamar Kohn, Céline Terrettaz, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler, Laura José Costa Henriques

We describe a novel biosafety aerosol chamber equipped with state-of-theart instrumentation for bubble-bursting aerosol generation, size distribution measurement, and condensation-growth collection to minimize sampling artifacts when measuring virus infect ...

Frontiers Media SA2024

Inactivation of influenza A virus in expiratory droplets and aerosol particles and the associated physicochemical drivers

Aline Laetitia Schaub

Influenza is an infectious respiratory illness caused by influenza viruses. Every year, it causes up to one billion cases of disease worldwide. Despite its high disease burden, the transmission pathway of influenza remains subject to debate. There is incre ...

EPFL2024

Acids from fruits generate photoactive Fe-complexes, enhancing solar disinfection of water (SODIS): A systematic study of the novel " fruto-Fenton " process, effective over a wide pH range (4-9)

César Pulgarin, Aline Laetitia Schaub, Stefanos Giannakis, Giulio Farinelli, Mona Kohantorabi

This study aimed to enhance solar disinfection (SODIS) by the photo-Fenton process, operated at natural pH, through the re-utilization of fruit wastes. For this purpose, pure organic acids present in fruits and alimentary wastes were tested and compared wi ...

Pergamon-Elsevier Science Ltd2024

Stability of influenza A virus in droplets and aerosols is heightened by the presence of commensal respiratory bacteria

Tamar Kohn, Htet Kyi Wynn, Céline Terrettaz, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Marta Augugliaro, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler, Laura José Costa Henriques, Daniel Scott Nolan

Aerosol transmission remains a major challenge for control of respiratory viruses, particularly those causing recurrent epidemics, like influenza A virus (IAV). These viruses are rarely expelled alone, but instead are embedded in a consortium of microorgan ...

American Society for Microbiology2024

Impact of organic compounds on the stability of influenza A virus in deposited 1-μL droplets

Tamar Kohn, Céline Terrettaz, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler

The composition of respiratory fluids influences the stability of viruses in exhaled aerosol particles and droplets, though the role of respiratory organics in modulating virus stability remains poorly understood. This study investigates the effect of orga ...

2024

Inactivation mechanisms of influenza A virus under pH conditions encountered in aerosol particles as revealed by whole-virus HDX-MS

Tamar Kohn, Jonathan Paz Montoya, Aline Laetitia Schaub, Athanasios Nenes, Giovanni D'Angelo, Kalliopi Violaki, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler

Multiple respiratory viruses, including influenza A virus (IAV), can be transmitted via expiratory aerosol particles, and aerosol pH was recently identified as a major factor influencing airborne virus infectivity. Indoors, small exhaled aerosols undergo r ...

2023

Expiratory Aerosol pH is a Driver of the Persistence of Airborne Influenza A Virus

Aline Laetitia Schaub

To mitigate the spread of a viral disease, it is crucial to understand the factors that influence airborne virus transmission. However, the micro-environment to which the virus is exposed in expiratory aerosol particles is highly complex. The relative humi ...

SWISS CHEMICAL SOC2023

Expiratory Aerosol pH: The Overlooked Driver of Airborne Virus Inactivation

Tamar Kohn, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler

Respiratory viruses, including influenza virus and SARS-CoV-2, are transmitted by the airborne route. Air filtration and ventilation mechanically reduce the concentration of airborne viruses and are necessary tools for disease mitigation. However, they ign ...

2023

Expiratory aerosol pH is determined by indoor room trace gases and particle size

Tamar Kohn, Aline Laetitia Schaub, Athanasios Nenes, Kalliopi Violaki, Shannon Christa David, Ghislain Gilles Jean-Michel Motos, Walter Hugentobler

2022