"We have, right now, a crisis with the coronavirus," said Biden, who is in Iowa campaigning before the Midwestern farm state holds Democrats' first nominating contest on Monday. "This is no time for Donald Trump's record of hysteria and xenophobia - hysterical xenophobia - and fearmongering to lead the way instead of science."

Biden said Trump had rolled back progress on global health oversight that occurred when he was vice president from 2009 to 2017.

In particular, he cited "draconian cuts" the White House proposed to the budgets of "the very agencies that we need to fight this outbreak," including the National Institutes of Health, the Centers for Disease Control and Prevention (CDC) and the United States Agency for International Development (USAID).

Matt Wolking, a spokesman for the Trump campaign, responded that Biden had made "foolish comments" as vice president in 2009 about avoiding airplanes during a swine flu crisis and "caused a public panic."

"In contrast, President Trump is listening to medical and scientific experts and taking every responsible precaution to protect the American people," he said.

The Trump administration declared a public health emergency on Friday and blocked foreign nationals who have traveled to China from entering the country. They also planned to impose a two-week quarantine on US citizens who have traveled within the past two weeks to China's Hubei Province, the epicenter of the coronavirus epidemic.

Still, officials insisted the risk to Americans from the flu-like illness is low. The outbreak has claimed more than 250 lives. None of the US cases have been fatal, and all but one of the patients contracted coronavirus while they were traveling in China.

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