Abbreviation	Description
COVID-19	Corona Virus Disease 2019
ES	Exponential Smoothing
FKF	Fuzzy Kalman Filter
KF	Kalman Filter
LASSO	Least Absolute Shrinkage and Selection Operator
LR	Linear Regression
LSTM	Long Short-Term Memory
MAE	Mean Absolute Error
MAD	Median Absolute Deviation
MAPE	Mean Absolute Percentage Error
MSE	Mean Square Error
OKID	Observer/Kalman Filter Identification
$R^2$	Coefficient of Determination
RMSE	Root Mean Square Error
RMSPE	Root Mean Square Percentage Error
SEIR	Susceptible–Exposed–Infectious–Recovered
SIR	Susceptible–Infectious–Recovered
SVD	Singular Value Decomposition
SVM	Support Vector Machine
VAF	Variance Accounted For
WCRVFL	Wavelet-Coupled Random Vector Functional Link