A generalized "SVEIR" epidemic model with general nonlinear incidence rate has been proposed as a candidate model for measles virus dynamics. The basic reproduction number $ \mathcal{R} $. an important epidemiologic index. was calculated using the next generation matrix method. https://www.bekindtopets.com/mega-super-Heated-3-Gallon-Flat-Back-Bucket-great-buy/