Crucially, deCODE’s “screening program accepts everybody who is not showing symptoms and not currently in quarantine,” Iceland’s Directorate of Health said in a statement, adding that Iceland-based company was doing it on the behalf of the Chief Epidemiologist and the health agency.
DeCODE, a subsidiary of US biotech company Amgen, has so far tested about 9,000 self-selected people.
“What it means in my mind, is that because we are screening the general population, we are catching people early in the infection before they start showing symptoms,” Stefánsson said.
“Keep in mind that the screening is now randomized, but voluntary so there is some bias in the data,” the Directorate of Health said in a statement, adding that a “randomized screening program has started and a blood serum screening for antibodies is planned.”
The work has also helped researchers to visualize the spread of the virus. “We can determine the geographic origin of the virus in every single [virus] in Iceland,” he said, adding there are specific, minor mutations for the virus that came from Italy, Austria and the UK. “There was one that is specific to the west coast of the United States,” he added.
Stefánsson wonders whether mutations in the virus are “responsible, in some way, for how differently people respond to it — some just develop a mild cold, while some people need a respirator,” or whether a person’s genetics dictates their condition.
“Or is it a combination of these two?” he asks.
Why has Iceland chosen not to implement a lockdown?
Officials say more restrictive measures haven’t been needed because they were better prepared and armed with data to track the virus.
“Testing and contact tracing are one of the key reasons why a lockdown has not been considered necessary up to this point,” its Directorate of Health said in a statement to CNN.
“There is also another reason, no less important, we have pursued a very aggressive policy of quarantine for individuals — suspected to be at risk of having contracted the virus — for much longer and at a higher scale than most other countries we are aware of.”
Iceland began testing its population in early February, weeks before its first coronavirus-related death, Stefánsson said, adding that health officials have aggressively contact-traced and quarantined confirmed and suspected Covid-19 cases.
“The only reason that we are doing better is that we were even more vigilant,” he said. “We took seriously the news of an epidemic starting in China. We didn’t shrug our shoulders and say, ‘this is not going to be anything remarkable.'”
Stefánsson expects the company to test at least 50,000 people — around 13% of the population — before the virus has run its course.
“It is extraordinarily important to know what the distribution in the society in general is because when you’re designing measures to contain the virus,” health officials need to know if the virus is running rampant through the community or circulating among clusters, he said.
Iceland has not been immune to supply shortages. Stefánsson said there were problems obtaining swabs for the tests, but these have since been rectified.
Could they provide a roadmap for other countries?
He says Iceland could help countries develop models for the spread of the disease, or to help researchers understand community transmissions.
He adds that many developed countries have an “amazing collection of talent” who could have “industrialized tests like this a long time ago” but “behaved like nothing was happening.”
Minali Nigam contributed to this report.