Lesions in the lungs of patients with pneumonia caused by a SARS-CoV-2 infection are distinct from those caused by bacteria.

A retrospective analysis of stored respiratory samples shows one patient could have been infected with SARS-CoV-2 weeks before the coronavirus was thought to have arrived in France, but a critic of the result questions whether the sample was contaminated.

Autopsies recently carried out in California show that one person died of the disease on February 6—three weeks before the nation recorded its first fatality.

As the first clinical data become available on treating coronavirus patients with the cells, scientists are equivocal about the rationale for the intervention.

Authorities had silenced Li Wenliang after he spoke out about the virus, now known as 2019-nCoV, in the early days of the epidemic.

Claims that a woman spread the virus to a colleague in Germany before she had symptoms conflict with health officials’ interview with the patient herself.