Switched Epidemic Models: A Contact Rate Dependent Analysis

•Proposed a new switched epidemic model arising from changes in contact rates in an infected society.•Considering vulnerable individuals as vaccination frontiers along with the possibility of vaccine failure.•Qualitative analysis of the model using two theorems on positive invariance set and positivity of solutions.•Global stability analysis of equilibria, with a focus on the basic reproduction number (R0) as a bifurcation value.•Manipulating the contact rates between subsystems through the contact-rate-dependent average dwell time to control a disease.