1. Malik JA, Maqbool M. COVID-19: an overview of current scenario n.d. https://doi.org/10.5667/CellMed.2020.0021.
2. Influenza A viruses; laboratory studies, with special reference to European outbreak of 1950-1;Isaacs;Bull World Health Organ,1952
3. A rare case of human coronavirus 229E associated with acute respiratory distress syndrome in a healthy adult;Vassilara;Case Rep Infect Dis,2018
4. Coronavirus press conference 11 February, 2020 Speaker;World Health Organization;J Chem Inf Model,2019
5. Transcription regulatory sequences and mRNA expression levels in the coronavirus transmissible gastroenteritis virus;Alonso;J Virol,2002