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 South Korea has run about 300,000 coronavirus tests, double that in Italy and ten times that in the U.S., says this report in the WSJ. This report shows how the South Korean testing works and the workday of Lee Hyuk-min, a clinical microbiologist at a testing lab of Yonsei University Health System Severance Hospital in Seoul, who is working from 4.45 am to 11 pm. South Korea's effectiveness in controlling the spread is based on a strategy of efficient testing that enables isolating quickly people and areas.

South Korea's testing network is a legacy of the MERS coronavirus outbreak in 2015, and the government failure at that time to control it.  It brings together doctors, medical staff, labs, and political leaders in roles following the protocols established since then. Dr Lee and others are the final checkpoint in the system which coordinates a diagnostic operation that combines together 633 test sites and 100 labs. The protocol includes a uniform setup- same testing equipment, same training, same decision making process.

At 8 am each day all labs upload results to a shared database, which allows public and private hospitals to monitor patient results and report them to Korea Centers for Disease Prevention and Control. Hospitals upload testing details to an online directory. This surveillance allows South Korea to predict where to concentrate its efforts for controlling spread, says Dr Lee who advises the South Korean government on lab testing issues.

Action plan took 2 years for the new rules to be implemented following MERS in 2015. The plan included accelerated bio testing company approval for tests. The first company got approval on Feb 4, followed by 4 other firms. Dr Lee says testing is only part of the equation as labs are needed to process and confirm results. Another key is innovation. South Korea setup testing in drive thru locations, that limit contact and speed up testing, which the U.S. is adopting. Dr Lee says early identification is key, and identifying the first coronavirus patient which was done in South Korea on January 20. Other countries including the U.S. took too long to identify the first patient, says Dr. Lee.