Health

Some scientists are confident that organs from genetically modified pigs will one day be routinely transplanted into humans. But substantial ethical questions remain.

Thousands of protesters gathered in Washington for Stand Up for Science, a rally in response to President Trump’s federal-funding and job cuts.

Dozens of studies have failed to find evidence of a link. The decision to re-examine the question comes as a measles outbreak, driven by low vaccinates rates, widens in Texas.

Scientists on overseas projects must say whether they work with communist governments and help combat “Christian persecution.”

Ms. Arakawa, the wife of the actor Gene Hackman, died from the effects of a disease often caused by contact with droppings from infected rodents.

The outbreak has sickened nearly 200 people in Gaines County, Texas. A neighboring county in New Mexico has seen 21 new cases since Tuesday.

Organizations funded by the United States helped keep dangerous pathogens in check around the world. Now many safeguards are gone, and Americans may pay the price.