毎日新聞

What's different about the hyper-infectious delta coronavirus variant?

The delta coronavirus strain is seen in this electron microscope photo provided by Japan's National Institute of Infectious Diseases. TOKYO -- Coronavirus infection numbers are exploding, and severe ...
朝日新聞社

Study: Mutation found that makes Delta variant more deadly

A certain mutation in the COVID-19 Delta variant causes infected cells to form disruptive chunks in the lungs and leads to more serious symptoms of the disease, a research team said. If the cells in ...
毎日新聞

Global studies show omicron variant has lower hospitalization risks compared to delta

This electron microscope photo shows the coronavirus's omicron variant successfully isolated at the National Institute of Infectious Diseases. (Photo courtesy of the National Institute of Infectious ...