One study reported elevated cytokine expression in Calu-3 cells infected with Omicron variants BA.1 and BA.2 relative to Delta: IFNB and CXCL10 gene expression was about four-fold higher, and secreted IFN-\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{upgreek}\usepackage{mathrsfs}\setlength{\oddsidemargin}{-69pt}\begin{document}$\beta$\end{document}β and CXCL10 levels were approximately three-fold higher at 48 h post-infection (Reuschl et al., 2024). Here, IFNA1 is linked to infection.