CDC changes guidance after Trump's demand to 'slow down' virus testing
The CDC now doesn’t recommend testing for those who have been in contact with infected patients, which could both show fewer cases but lead to more virus spread.
U.S. health officials have sparked a wave of confusion after posting guidelines that coronavirus testing is not necessary for people who have been in close contact with infected people.
The new guidance was posted earlier this week on the website of a federal agency, the Centers for Disease Control and Prevention.
The CDC previously had advised local health departments to test people who have been within 6 feet of an infected person for more than 15 minutes. But on Monday a CDC testing overview page was changed to say that testing is no longer recommended for symptom-less people who were in close contact situations.
There was a caveat, however. Testing may be recommended for those with health problems that make them more likely to suffer severe illness from an infection, or if their doctor or local state officials advise they get tested.
CDC officials referred all questions to the agency’s parent organization, the U.S. Department of Health and Human Services in Washington, D.C. That suggests that HHS ordered the change, not CDC, said Jennifer Nuzzo, a Johns Hopkins University public health researcher.
After twitter lit up with head-scratching and alarm about the change, HHS officials sent an email Wednesday saying the guidance was revised “to reflect current evidence and the best public health interventions,” but did not detail what the new evidence was.
The officials also said they wanted to emphasize that people should follow measures designed to help stop spread of the virus, like wearing a mask, staying at least 6 feet apart from others and washing hands.
The decision came out of meetings of a White House coronavirus task force, the email said.
HHS officials also scheduled a briefing for Wednesday afternoon to answer questions.
Across the country, public health experts called the change bizarre. They noted that testing contacts of infected people is a core element of public health efforts to keep outbreaks in check, and that a large percentage of infected people — the CDC has said as many as 40% — exhibit no symptoms.
“I was taken aback and didn’t know that it was under consideration,” said John Auerbach, president of Trust for America’s Health, a nonprofit that works to improve U.S. preparedness against disease. “The recommendation not to test asymptomatic people who likely have been exposed is not in accord with the science.”
Ultimately, restricting testing could be self-defeating, because it could skew the numbers and create a perception that rates of infection are higher. Testing people who appear to be healthy would tend to lower the overall rate of positive results, while narrowing testing to people who are sick would raise the overall positive rate, Auerbach said.
Why HHS would order such a change quickly became a matter of speculation. Dr. Carlos del Rio, an infectious diseases specialist at Emory University, suggested in a tweet that there are two possible explanations.
One is that it may be driven by testing supply issues that in many parts of the country have caused widely reported delays in results of a week or more, he suggested.
In the HHS email, agency officials said that is not the reason, and argued that testing capacity is plentiful.
Another possible explanation is that Donald Trump simply wants to see case counts drop, and discouraging more people from getting tested is one way to do it, del Rio said.
Dr. Tom Frieden, who was head of the CDC during the Obama administration, said the move follows another recent change: to no longer recommend quarantine for travelers coming from areas where infections are more common.
“Both changes are highly problematic” and need to be better explained, said Frieden, who now is president of Resolve to Save Lives, a nonprofit program that works to prevent epidemics.
Frieden said he, too, believes HHS forced CDC to post the changes. He called it “a sad day” because “CDC is being told what to write on their website.”
New York Gov. Andrew Cuomo harshly criticized the new CDC recommendations and said the state would not be following the guidance.
“Why would you reverse yourself on the quarantine order? Because they don’t want publicity that there is a COVID problem. Because the president’s politics are, ‘COVID isn’t a problem We’re past COVID. It’s all about the economy,'” Cuomo told reporters on a conference call.
“What possible rationale is there to say ‘You’re in close contact with a COVID-positive person. And you don’t need a test?” Cuomo said.
The principal investigator of California’s contract tracing program, Dr. George Rutherford of University of California, San Francisco, agreed.
“I hesitated to say public health malpractice,” Rutherford said. “In order to control this, especially in the context of contact tracing, you absolutely have to test people without any symptoms.”
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