Mar 28, 2020 - Health

The other coronavirus test we need

Illustration: Sarah Grillo/Axios

Researchers are racing to develop tests that detect whether someone may have developed immunity to the coronavirus, which could help society return to normal faster.

Why it matters: These tests could help people know if they are able to go back to work, as well as aid researchers in tracking the scale and death rate of the disease — key data for current and future pandemic policies.

Background: SARS-CoV-2, the virus that causes COVID-19, is new to the human body, meaning it has no immunity to it yet. And, since there isn't a vaccine — and there won't be for a while — it's difficult to ensure someone will be protected from the virus unless they know they've had the infection.

  • But people without symptoms can have COVID-19 and not know it, making it more difficult to pinpoint who's had been infected.

How it works:  When the body is exposed to a virus, the immune system begins to produce antibodies to fight the virus and future infections from it.

  • Those antibodies stick around after the virus is cleared from the body, making them an indicator of past infection.
  • Serological tests check the blood for these antibodies — providing confirmation of infection and possible protection.
  • That’s different from the diagnostic tests receiving most of the public's attention; those confirm whether someone has an active infection.

These tests could be especially useful for determining whether health care workers have some immunity and are at lower risk if they go back to work, says Nick Evans, an assistant professor at UMass Lowell.

  • They can also be used to sample the population in order to form better estimates of the scale of infection and the death rate of the virus, says Jesse Bloom, a virologist at Fred Hutchinson Cancer Research Center.

Where it stands: Researchers at universities, companies and the Centers for Disease Control and Prevention are working to develop tests to detect antibodies to SARS-CoV-2.

  • Academic labs can develop the tests relatively quickly but to carry them out on a clinical scale with a large number of samples is "in some ways as much a matter of logistics as science," says Bloom, who's also an investigator with Howard Hughes Medical Institute.
  • British officials said Wednesday they were ordering at least 3.5 million "finger-prick" serological tests that could be purchased via online entities like Amazon and taken at home, per Nature.

The catch: The utility of the test hinges on the supposition that people who've had COVID-19 are immune to new infections — an open question as "the evidence is not ironclad," Bloom tells Axios.

  • But preliminary research suggests that, unlike influenza viruses, SARS-CoV-2 isn't mutating fast and infection with the virus could confer immunity for months to years.
  • And in a small study that has not been peer-reviewed, researchers were unable to reinfect macaque monkeys that had been previously infected with the virus.

What to watch: Widespread testing could raise privacy concerns. "People still have privacy rights, even in a pandemic, and I don't see a reason for public disclosure. That's important, because my hunch is people's worst natures will show up and they'll start demanding disclosure, much like with other infectious diseases (e.g. HIV)," Evans said.

Go deeper: How does the coronavirus behave inside a patient? (The New Yorker)

Editor's note: This story has been clarified by taking out the word "innate" to describe the immune system.

Go deeper

Updated 1 hour ago - Politics & Policy

DOJ to treat antifa involvement in protests as domestic terrorism

Barr and Trump. Photo: Doug Mills-Pool/Getty Images

Attorney General Bill Barr said in a statement Sunday that the Justice Department will use its network of 56 regional FBI Joint Terrorism Task Forces to identify the "criminal organizers and instigators" of violence during the George Floyd protests, including antifa and similar groups.

Why it matters: Barr, President Trump and other members of the administration have pinned the blame for riots and looting over the past few days of protests against police brutality on antifa, a loosely defined far-left movement that uses violence and direct-action protest tactics.

Updated 2 hours ago - Politics & Policy

Journalists get caught in the crosshairs as protests unfold

A man waves a Black Lives Matter flag atop the CNN logo outside the CNN Center during a protest in response to the police killing of George Floyd, Atlanta, Georgia, May 29. Photo: Elijah Nouvelage/Getty Images

Dozens of journalists across the country tweeted videos Saturday night of themselves and their crews getting arrested, being shot at by police with rubber bullets, targeted with tear gas by authorities or assaulted by protesters.

Why it matters: The incidents show how easy it can be for journalists to become entangled in the stories they cover, especially during a time of civil unrest.

4 hours ago - Technology

Trump and Zuckerberg share phone call amid social media furor

Photo: Alex Wong/Getty Images

In the week that President Trump took on social media, Axios has learned that he had a call Friday with Facebook CEO Mark Zuckerberg that was described by both sides as productive.

Why it matters: With the White House and Twitter at war, Facebook has managed to keep diplomatic relations with the world's most powerful social-media devotee.