Almost 2,000 athletes at the World Championships will be blood-tested in an unprecedented anti-doping program.

According to BBC, for the first time every athlete at a major event will be blood-tested under the same conditions, within the same period, in South Korea from 18 August. Blood-testing will take place alongside more-established urine testing, involving approximately 500 samples around the event in Daegu, South Korea from August 27 to September 4 .

Blood samples from the competitors will mainly be collected at a purpose-built doping control station located in the athletes' village.

The samples will be tested on-site and then sent back to a specialist laboratory in Lausanne, Switzerland.

Suspicious blood results could trigger follow-up tests in Daegu in urine and or further analysis in Lausanne.