The infectious disease epidemiologist who oversees the World Health Organization’s (WHO’s) program on emerging diseases and zoonoses began Sunday morning with a start: A researcher contacted her and said colleagues had uncovered crucial new data from China that speak to the origin of the pandemic. The researcher told Van Kerkhove—who was preparing to leave her home in Geneva for a...

Peanuts have a dark side. In some people, they can cause a dangerous and sometimes deadly allergic reaction marked by a sharp drop in body temperature and blood pressure, as well as difficulty breathing. This anaphylactic shock has typically been blamed on the immune system going into overdrive. But a new study in mice pegs an additional culprit: the nervous system ....

The number of high-containment labs studying the deadliest known pathogens is booming. A new analysis warns the growing number of labs is raising risks of an accidental release or misuse of germs such as the Ebola and Nipah viruses. “The more labs and people working with dangerous pathogens, the risks go up,” says biosecurity expert Filippa Lentzos of King’s College London,...

A scientific sleuth in France has identified previously undisclosed genetic data from a food market in Wuhan, China, that she and colleagues say support the theory that coronavirus-infected animals there triggered the COVID-19 pandemic. Several of the researchers presented their findings on Tuesday to the Scientific Advisory Group for the Origins of Novel Pathogens (SAGO), an expert group...