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On Tuesday, the Democratic nominee shared the debate stage with President Trump, who has tested positive for the virus.

The negative result comes just hours after President Trump announced that he and the first lady had tested positive for the virus.

House Speaker Nancy Pelosi will pray for the president and first lady after they tested positive for the coronavirus and says she hopes this is a wake-up call for others who ignored safety measures.

Separately, President Trump's nominee to fill the Supreme Court seat made vacant by the death of Justice Ruth Bader Ginsburg tested negative for the coronavirus, a White House spokesman says.

South Korea's president sent President Trump a message of "solace and encouragement." A Chinese newspaper editor tweeted that Trump had "paid the price for his gamble to play down the COVID-19."

The study compared the habits and activities of 314 adults who had been tested for the virus. Those who tested positive more often reported dining at a restaurant within 14 days of showing symptoms.

Scientists are racing to develop a vaccine that proves "safe and effective." It may not prevent infection in everyone who gets it, but it still could eventually stop the pandemic. Here's how.

Some pharmaceutical companies are well into the final phase of clinical trials for a coronavirus vaccine. But efforts to recruit patients from minority groups are just beginning.

David Legates, a professor whose research has been supported by fossil fuel companies, has been hired for a top position at the federal agency that oversees weather and climate forecasting.

In Northern California, the deadly Bear Fire forced the evacuation of parts of the town of Paradise, which nearly burned to the ground in 2018. For Camp Fire survivors, the trauma is all coming back.