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Background: Percentile curves are often used to assess variances in children’s growth pattern. This study is aimed at explaining effect of the respondents’ sociodemographic characteristics on under-5 children’s birth weight and identifying most suitable models, out of 11 statistical models reviewed, for estimating children’s growth in terms of height and weight of a given birth-weight category and obtain estimated growth curves. Material and Methods: The study used National Family Health Survey (NFHS)-4 data from four Eastern States of India, consisting of 54,075 under-5 children. Estimated growth curves were obtained, using best-fit models. Results: Birth weight was found to be associated with children’s age, gender, birth order, body mass index, mother’s education, living place and wealth index. Two models – Cubic Model and Power Model – showed best fit to the height and weight measurements. We obtained estimated growth curves of boys and girls for a given birth-weight category. Conclusions: All socio-demographic factors studied, except respondent’s occupation, were associated with children’s birth weight. Cubic and Power Models were most suitable for assessing growth in terms of height and weight of boys and girls, belonging to a given birth-weight category.

Severe Acute Respiratory Syndrome Corona virus 2 (SARS-CoV-2) is named as Corona-virus that causes Corona virus disease 2019 . Corona virus disease is transmitted from people to people through respiratory droplets and contact routes. 1 Droplet transmission occurs through close contacts with someone who has COVID-19 symptoms. Hence, Corona virus disease transmission occurs by direct contact with infected people or by contacts with surfaces in the immediate environment or objects, used by infected persons. Thus, people may acquire Corona virus disease through air or after touching contaminated objects even after hours. 2 Airborne transmission of the disease could be possible in specific circumstances and settings. WHO declared outbreak of COVID-19 disease a Public Health Emergency of International Concern on 30 January 2020. 3 Novel Corona Virus (nCoV) is a provisional name, which has been given to Corona viruses. The word 'novel' indicates a new pathogen of a previously known family of viruses. 'COVID-19' is the name, given by WHO officially, to Corona virus disease. 4 Here, 'co' and 'vi' come from Corona Virus with 'd' meaning disease and '19' stands for year 2019. Common symptoms of the COVID-19 disease are fever, cough, headache, shortness of breath and loss of taste, etc. Due to huge impact of the disease on different aspects of human life, novel Corona Virus disease (COVID-19) has been most talked about, among infectious diseases.At present, 218 countries and territories around the world, are affected from the COVID-19. In India, its first case was diagnosed in the State of Kerala on 30 th January 2020. Since then, graph of COVID-19 cases in the country increased almost exponentially. The swift response of the Government of India, however, has reasonably contained the rapid progress of the infection. The Government of India had announced nationwide 'lockdown' from 25th March 2020 to 31 May 2020 in 4 phases to contain the Covid19 disease. The 5 th phase of lockdown was limited to containment zones only. The consequences