Scientists Discover Hidden ‘Kill Switch’ Created by COVID-19 Virus October 12, 2025 | No Comments Scientists Discover Hidden ‘Kill Switch’ Created by COVID-19 Virus Long-persisting SARS-CoV-2 spike-specific CD4+ T cells associated with mild disease and increased cytotoxicity post COVID-19 https://www.nature.com/articles/s41467-025-63711-9