Kumar M, K., D. Bhuva, S. Patel, A. Shah, and A. Kavishvar. “Seropositivity of COVID-19 Among Healthy Voluntary Blood Donors and Its Association With Blood Groups: A Reflection of Burden of Asymptomatic COVID-19 Cases in The District of South Gujarat”. National Journal of Community Medicine, vol. 13, no. 09, Sept. 2022, pp. 636-41, doi:10.55489/njcm.130920222311.