Levels of two major air pollutants have been drastically reduced since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant – ground-level ozone – has increased in China, according to new research.

Evidence from a large study of several thousand patients shows that men have higher concentrations of angiotensin-converting enzyme 2 (ACE2) in their blood than women. 

In recent years, giant viruses have been unearthed in several of the world’s most mysterious locations, from the thawing permafrost of Siberia to locations unknown beneath the Antarctic ice. 

Chronic rejection of transplanted organs is the leading cause of transplant failure, and one that the field of organ transplantation has not overcome in almost six decades since the advent of immunosuppressive drugs enabled the field to flourish. 

A woman walking down the street hears a bang. 

A University of Cincinnati researcher says a study of COVID-19 patients shows loss of the sense of smell is most likely to occur by the third day of infection with the novel virus. 

To keep patients and health-care providers safe from COVID-19, while providing urgent treatment to stroke patients, extra precautions must be taken, according to new guidelines published in the journal Stroke.

Traffic pollution for most parts of the UK is plummeting thanks to the COVID-19 lockdown but more urban ozone is probably being generated, say experts from The University of Manchester.

The Agricultural and Food Policy Center at Texas A&M estimates some of the state's agricultural products could see losses of up to 40 percent.

The coronavirus pandemic has highlighted just how reliant the United States and other countries are on Chinese manufacturing, with widespread shortages of protective medical gear produced there.