Rathnayake, P.P.P.M.T.D.; Wickramaarachchi, D.N.; Senanayake, J.M.D.
(Faculty of Science, University of Kelaniya, Sri Lanka, 2020)
Coronavirus Disease 2019 (COVID-19) is a respiratory infection caused by a newly discovered coronavirus. As of September 2020, within about eight months of this infectious disease being identified, more than thirty million ...