  The basic Susceptible-Infected-Recovered (SIR) model is extended to include
effects of progressive social awareness, lockdowns and anthropogenic migration.
It is found that social awareness can effectively contain the spread by
lowering the basic reproduction rate $R_0$. Interestingly, the awareness is
found to be more effective in a society which can adopt the awareness faster
compared to the one having a slower response. The paper also separates the
mortality fraction from the clinically recovered fraction and attempts to model
the outcome of lockdowns, in absence and presence of social awareness. It is
seen that staggered exits from lockdowns are not only economically beneficial
but also helps to curb the infection spread. Moreover, a staggered exit
strategy with progressive social awareness is found to be the most efficient
intervention. The paper also explores the effects of anthropogenic migration on
the dynamics of the epidemic in a two-zone scenario. The calculations yield
dissimilar evolution of different fractions in different zones. Such models can
be convenient to strategize the division of a large zone into smaller sub-zones
for a disproportionate imposition of lockdown, or, an exit from one.
Calculations are done with parameters consistent with the SARS-COV-2 pathogen
in the Indian context.
