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Time series of new daily COVID-19 deaths in South Korea from January 20, 2020, to July 31, 2021, and predicted values in the generalized linear models (GLMs) and linear regression (LR) models. GLM1: GLM with a normal distribution; GLM2: GLM with a Poisson distribution; GLM3: GLM with a negative binomial distribution; LR1: LR model with lasso regularization; LR2: LR model with adaptive lasso regularization; LR3: LR model with elastic net regularization; RMSE: root mean square error.
