IFNG and COVID-19: By using flow cytometric analysis of whole blood samples obtained longitudinally during the acute and recovery phases of COVID-19 infection, Rodriguez et al. demonstrated transient expansion of activated CD62L+ eosinophils mediated by interferon-gamma (IFN-γ) and suggest that this immunomodulation may promote eosinophil trafficking to the lung following acute infection, providing a potential mechanism for COVID-19-associated eosinophilic lung pathology56.