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The standard test for infection with the coronavirus looks for a genetic fingerprint. Laboratory errors, including contamination, can lead to false results, a problem seen with environmental testing.

When Charli Lello was furloughed from her job, she decided to pass the time by incubating duck eggs. A month after putting eggs in the incubator, ducklings began to emerge from their shells.

A cluster of COVID-19 cases, linked to a produce market in Beijing, sparked fears of a second wave. Officials are resurrecting some lockdown measures and testing tens of thousands of nearby residents.

As COVID-19 cases surge in Mexico, a doctor in Mexico City and nurse in Tijuana — the two virus hotspots — talk about the strains and grief of treating patients over the last several weeks.

Alcohol and drug consumption have increased recently, but fewer patients have sought treatment. Most treatment centers face possible closure even as they anticipate a post-pandemic surge in need.

The Supreme Court says the federal ban on discrimination "based on sex" applies to gay, lesbian and transgender employees.

Justice Clarence Thomas dissents, saying the "qualified immunity doctrine appears to stray from the statutory text."

The U.S. Supreme Court delivered a victory for LGBTQ workers, ruling that the federal law that bars sex discrimination in employment applies to LGBTQ employees.

Planned Parenthood Action Fund endorses former Vice President Joe Biden despite a mixed record on abortion rights. To support Democrats, the group is boosting spending by 50% over the 2016 campaign.

Ewing's 1919 looks back on a century-old riot in Chicago, set off after a black teen drowned while being stoned by white people. She says the systemic racism that plagued the U.S. then still exists.