The first paper, "A Novel Virus Isolated from the Human Respiratory Tract," describes the isolation of a new virus, called 229E, from samples taken from medical students with mild respiratory illness. The researchers showed that the virus is RNA, ether-sensitive, and not genetically related to known respiratory viruses. The second paper, "Non-Specific Hemadsorption by Rhesus Monkey Kidney Cells," examines the hemadsorption observed in rhesus monkey kidney cell cultures, a phenomenon commonly attributed to simian virus contamination. The authors argue that hemadsorption can be easily identified and differentiated from viral infection, and provides detailed information on this phenomenon in the context of virus detection in cell cultures.

Hamre, D., & Procknow, J. J. (1966). A New Virus Isolated from the Human Respiratory Tract. Proceedings of the Society for Experimental Biology and Medicine, 121(1), 190–193. https://doi.org/10.3181/00379727-121-30734

Liu, Y.-C., Kuo, R.-L., & Shih, S.-R.
(2020). COVID-19: The first documented coronavirus pandemic in history. Biomedical Journal, 43, 151-158. https://doi.org/10.1016/j.bj.2020.04.007