Acute pneumonia developed in a previously healthy man during the outbreak of severe acute respiratory syndrome (SARS) in southern China in March 2003. Antibiotic treatment was ineffective, and he died 8 days after illness onset. Human metapneumovirus was isolated from lung tissue. No other pathogen was found. Other etiologic agents should thus be sought in apparent SARS cases when coronavirus infection cannot be confirmed.
Chan, P. K. S., To, K. F., Wu, A., Tse, G. M. K., Chan, K. F., Lui, S. F., Sung, J. J. Y., Tam, J. S., & Tomlinson, B. (2004). Human Metapneumovirus-associated Atypical Pneumonia and SARS. Emerging Infectious Diseases, 10(3). https://doi.org/10.3201/eid1003.030513