  We propose an epidemic model SIPHERD in which three categories of infection
carriers Symptomatic, Purely Asymptomatic, and Exposed are considered with
different rates of transmission of infection that are taken dependent on the
lockdown and social distancing. The rate of detection of the infected carriers
is taken dependent on the tests done per day. The model is applied for the
COVID outbreak in Germany and South Korea to validate its predictive
capabilities and then applied to India and the United States for the prediction
of its spread with different lockdown situations and testing in the coming
months.
