A group of researchers from Guangdong created an open-source prediction tool that can identify the COVID-19 patients who are at the high risk of progression from mild and moderate type to severe and critical type.

The Trump administration's new policy of prohibiting foreign students from taking online-only courses in the US this fall has sparked immediate backlash from leading educational institutions, with some now taking legal action against it.

The United States on Tuesday officially submitted its notification of withdrawal from the World Health Organization (WHO) to the United Nations secretary-general, setting in motion the country's exit from the global body in the midst of the COVID-19 pandemic.

When passing through the metro security check, some passengers will lift the lead curtain at the exit of the X-ray security inspection machine to get their belongings back as soon as possible. Some even directly put their head or hands into the machine to pick up their bags. Is it right to do so? Will the security inspection machine pose a radiation hazard to passengers?