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Robust testing for COVID-19 is critical missing link

#279 of 1611 articles from the Special Report: Coronavirus in Canada
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On March 16, World Health Organization director-general Dr. Tedros Adhanom Ghebreyesus said: “You cannot fight a fire blindfolded, and we cannot stop this pandemic if we don’t know who is infected. We have a simple message for all countries: Test, test, test, test.”

The B.C. government is not doing this, saying, “Who should be tested for COVID-19? People with respiratory symptoms who are: hospitalized, or likely to be hospitalized; health-care workers; residents of long-term care facilities; part of an investigation of a cluster or outbreak.”

It is still not testing “… people without symptoms” and “patients with mild respiratory symptoms who can be managed at home, including returning travellers with an onset of illness within 14 days of return to Canada.”

B.C. test results take up to three days to appear. The BC Centre for Disease Control website says: “People who have been tested are asked to wait 72 hours before calling the Negative Results line. Most people who have been tested are calling before the 72 hours and, as a result, the line is experiencing an extremely high call (rate)."

That sounds more like an understaffed corporate complaint line than a public service response to a dangerous pandemic.

For a successful campaign against COVID-19, authorities need a low threshold for testing and access to effective and efficient — and abundant — tests.

Simultaneously, awareness that asymptomatic infected persons spread infection is growing — while some British Columbians continue to ignore social distancing and self-isolation.

Sergio Romagnani, one of the medical experts overseeing the miraculous sparing of Vo, the little town in Italy that tested everyone — twice — and now has no further infections, put it this way in the British Medical Journal: “Isolation of asymptomatics is essential for controlling the spread of the virus ...”

Public confidence in such circumstances might be enhanced by news that testing is critical and will be expanded as soon as possible, as soon as the BCCDC can get fast and reliable test kits.

Countries that have suppressed COVID-19, like Singapore and South Korea, have done so by including aggressive testing and case followup from the very beginning of their response in the early days of the burgeoning pandemic. They have also made masks mandatory in the community, as more countries are doing.

Taiwan suppressed COVID-19 differently. With a well-funded public health system that began preparing years ago — and an epidemiologist as its vice-president — authorities carried out fewer than 25,000 total tests because they had access to “big data” on citizens that allowed precise tracking of travel movements of Taiwanese citizens and others — data that would be difficult to obtain in Canada because of privacy laws.

Many European countries, noting the calamities in Spain and Italy, are expanding testing. Britain is desperately trying to ramp up its testing program, while Sweden now realizes its hands-off approach lacks testing rigour.

The worst testing boondoggle arises from Donald Trump’s moral inadequacy, leading to opportunities missed and a chaotic approach among the patchwork of state responses.

Individual U.S. states are grappling with a perplexing mix of public, private, research and academic facilities — all with different standards and protocols.

One national company, Quest Diagnostics, has failed to expand its California facilities for high-throughput capacity, while still accepting samples (oddly, it’s paid for samples taken, not tests completed). As of March 31, Quest had nearly 60,000 unprocessed samples.

Possibly infected patients must be treated as positive until their sample is finally processed, causing overuse of precious PPEs (personal protective equipment) by doctors and nurses. As Dr. Geoff Baird from the University of Washington put it: “Lab turnaround time is PPE.”

For a successful campaign against COVID-19, authorities need a low threshold for testing and access to effective and efficient — and abundant — tests.

Only then can they fight this fire without blindfolds.

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