Co-infections of SARS-CoV-2 with multiple common respiratory pathogens in infected patients

In late December 2019, an outbreak of severe pneumonia caused by an unknown etiological agent was initially reported in Wuhan, China, and then quickly spread throughout China and even abroad (Zhu et al., 2020).Swift control measures and etiological investigations were conducted by the Chinese government, physicians and researchers, and by using high throughput sequencing and virological testing, the mysterious pneumonia pathogen was shown to be a novel coronavirus (SARS-CoV-2) capable of person-to-person transmission (Zhu et al., 2020).Coronaviruses are a group of non-segmented, enveloped and positive-sense RNA viruses that belong to the subfamily of Coronavirinae in the family of Coronavirdiae and order of Nidovirales.Prior to the COVID-19 outbreak, six coronaviruses have been documented to be able to infect humans.Of them, the Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV)