“Covid-19 Endogenous Mutation Of Nb 1.8.1, Lf.7 And Kp.3: Applying A Multivariate Time-Series Model To Forecast Key Healthcare Indicators Through 2027”. International Journal of Environmental Sciences (July 17, 2025): 340–353. Accessed September 18, 2025. https://theaspd.com/index.php/ijes/article/view/4080.