COVID-19 a pandemic due to novel corona virus emerged from Wuhan, China in December 2019 and now the whole world facing its threat. This is a disaster pandemic for  almost every nation on the earth. Such novel corona virus impacts on every country in  the world irrespective of race, ethnicity, environment and economic status. In this study, an attempt has been made to use statistical process control technique to understand spread of COVID-19 in some major states of India as well as India. Warning limits and control limits has been estimated and discussed for average weekly growth index of COVID-19 pandemic. Study indicates that there is no hope for controlling the  pandemic in near future because the average weekly growth index of COVID-19 pandemic is far from zero.

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Some social phenomenon were analysed by physicists using tools from core field of physics and the area of this type of study sometimes called socio-physics and econo-physics. Most of the work has appeared in physics journals. In the present paper an attempt has been made to develop this type of work in the field of demography. The focus is on the application of a differential equation model, to the study of the long term trend in level of fertility and infant mortality. The model is found to provide an excellent fit to the data, indicates that the trend is an exponential growth trend. Correlation and root mean squared error reveals that the estimated value has good agreement with the observed value. The model has been also used for prediction purpose.

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In this paper an attempt has been made to inspect the distribution of the number of adult migrants from household through size biased probability models based on certain assumptions. Size Biased Poisson distribution compounded with various forms of Gamma distribution i.e. Gamma (1,θ) , Gamma (2,θ) and mixture of Gamma (1,θ) and Gamma (2,θ)  has been examined for some real data set of adult migration. The parameters of the proposed model have been estimated by method of maximum likelihood.  test indicates that the distributions proposed here are quite satisfactory to explain the pattern of adult out migration.