Browsing by Author "Shraddha Mishra"

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Did COVID-19 or COVID-19 Vaccines Influence the Patterns of Dengue in 2021? An Exploratory Analysis of Two Observational Studies from North India
(American Society of Tropical Medicine and Hygiene, 2023) Upinder Kaur; Parth Jethwani; Shraddha Mishra; Amol Dehade; Ashish Kumar Yadav; Sasanka Chakrabarti; Sankha Shubhra Chakrabarti
Dengue experienced a rise in disease burden in 2021 in specific regions of India. We aimed to explore the risk factors of dengue occurrence and severity in the post-COVID-19 and post-COVID-19 vaccination era and performed an exploratory analysis involving participants from two prior observational studies conducted from February 2021 to April 2022 in a tertiary hospital in North India. Health care workers constituted the majority of the study participants. Individuals were stratified into five groups based on COVID-19 infection and timing of vaccination: COVID-No Vaccine, Vaccine-No COVID (VNC), COVID After Vaccine (CAV), Vaccine After COVID (VAC), and No Vaccine-No COVID (NVNC) groups. The occurrence of laboratory-confirmed dengue and severe forms of dengue were the main outcomes of interest. A total of 1,701 participants (1,520 vaccinated, 181 unvaccinated) were included. Of these, symptomatic dengue occurred in 133 (7.8%) and was “severe” in 42 (31.6%) cases. Individuals with a history of COVID-19 in 2020 had a 2-times-higher odds of developing symptomatic dengue (P 5 0.002). The VAC group had 3.6 (P 5 0.019)-, 2 (P 5 0.002)-, and 1.9 (P 5 0.01)-times-higher odds of developing symptomatic dengue than the NVNC, VNC, and CAV groups, respectively. The severity of dengue was not affected by COVID-19 vaccination but with marginal statistical significance, a 2-times-higher risk of severe dengue was observed with any COVID-19 of the past (P 5 0.08). We conclude that COVID-19 may enhance the risk of developing symptomatic dengue. Future research should explore the predisposition of COVID-19-recovered patients toward other viral illnesses. Individuals receiving COVID-19 vaccines after recovering from COVID-19 particularly seem to be at greater risk of symptomatic dengue and need long-term watchfulness. Possible mechanisms, such as antibody-dependent enhancement or T-cell dysfunction, should be investigated in COVID-19-recovered and vaccinated individuals. Copyright © 2023 The author(s)
Investigation of overvalued and undervalued stocks: The case of BSE Sensex
(Inderscience Publishers, 2016) Shraddha Mishra; Raj Kumar
Concerns with overvaluation and undervaluation in financial markets are the focus of behavioural economics and finance (Barberis and Thaler, 2003). The prime objective of the paper is to analyse the valuation of the stocks in the market. There are two giant indices in Indian stock market, i.e., Bombay Stock Exchange and National Stock Exchange (BSE & NSE). We refereed BSE index for the study because of the higher market capitalisation to gross domestic product (GDP) ratio as compared to NSE index. The period of the study is five years from 2009-2013. The top 20 companies listed at BSE on the basis market capitalisation as of 31 March 2013 have been chosen. Due to data inadequacy, two companies namely Coal India Ltd. and Cairn Ltd has not been considered. The study concludes that out of 18 companies, seven are overvalued, whereas, 11 are undervalued. It has also been observed that overvalued companies are the kings of their respective industry and they are retrieving the benefits of their leadership from the market. Finally, the study reveals that the Indian stock market is moderate and efficient in nature. Copyright © 2016 Inderscience Enterprises Ltd.