WASHINGTON — Federal Reserve Chairman Jerome Powell said Tuesday that the U.S. economy appears durable, with steady growth and unemployment near a half-century low, but it faces risks from the broadening viral outbreak that began in China.

Powell also said that the Fed is content with where interest rates are, suggesting that no further rate cuts would be contemplated unless economic conditions were to change significantly. Since last fall, the Fed has kept its benchmark short-term rate in a low range of 1.5% to 1.75%, well below levels typical during previous economic expansions.

The chairman made his remarks Tuesday to the House Financial Services Committee on the first of two days of semiannual testimony to Congress.

The Fed is monitoring developments stemming from the coronavirus, Powell said, which he cautioned “could lead to disruptions in China that spill over to the rest of the global economy.”

In response to questions, Powell said it was too early to assess the scope of the threat the virus poses to the U.S. economy. But he observed that the economy “is in a very good place,” with strong job creation and steady if modest growth.

“We will be watching that carefully,” he said about the virus’ impact. “And the question we will be asking is will these be persistent effects that could lead to a material reassessment of the outlook” in the United States.

The daily death toll in China topped 100 for the first time, raising the number of deaths there from the virus above 1,000. China remained mostly closed to business, with around 60 million people under virtual quarantine in the country.

The lockdown has raised concerns about how much damage the loss of production in China, the world’s second-largest economy, will inflict on global supply chains. China accounts for more than 80% of smartphone and notebook production globally and more than half of global TV and server production, according to recent estimates.

In the midst of his testimony Tuesday, Powell drew an attack from a familiar corner: President Donald Trump, the man who nominated him to the Fed’s chairmanship but who has repeatedly attacked him since for not cutting rates more aggressively.

“Fed rate is too high,” Trump tweeted. “Dollar tough on exports.”

The president complained in his tweet that the Dow Jones Industrial Average had slipped during Powell’s testimony, though the Dow later recovered. It was unclear that Powell’s testimony had directly affected stock prices either way.

Asked during the hearing about the tweet, Powell gave his standard reply that he and other Fed officials are concerned only with their mandate to serve the economy and do not consider outside criticism — from the president or anyone else — in their policy-making.

“My colleagues and I are completely focused on using our tools to support ... our goals, and that is all we are focused on,” he said.