The synchronization of innate and adaptive lung immune responses to SARS-CoV-2 during COVID-19 pneumonitis is poorly understood. In this webcast, the speaker will describe applying single-cell profiling to bronchoalveolar lavages from patients with mild or critical COVID-19 versus non-COVID-19 pneumonia as a control, and how this research is furthering understanding of lung-localised immunity and the inflammation landscape during COVID-19.