Biden’s risk of contracting COVID-19 a ‘deep concern’ after debate, doctor says Post author By Katelin Snyder Post date October 2, 2020 The probability of infection increases with the time that particles remain in the room,” Rainald Lohner, who runs the Center for Computational … View Full Article ← Ventilation and COVID-19: Reduce spread with proper airflow → How Safe Are You From Covid When You Fly?