Tokyo Marathon PCR Testing Discovered 108 Optimistic Instances Pre-Race, No Hyperlink to Put up-Race Clusters


As a part of the countermeasures established by the Tokyo Marathon Basis to make sure the security of individuals by stopping clusters of recent coronavirus infections on the 2021 Tokyo Marathon held on Sunday, Mar. 6, 2022, the TMF established a countermeasure overview committee and examine group to develop efficient measures for coping with infectious illness danger for the aim of conducting a protected and safe occasion. A abstract of the outcomes from PCR testing performed on runners earlier than the race by occasion medical companions F Medical Gear Co., Ltd. and Tokyo TMS Clinic are as follows. The whole report is linked on the backside.

Of 19.527 assessments carried out on runners within the three days previous to the race, 108 optimistic circumstances had been found, a positivity fee of 0.55%. No faulty assessments had been found. Not one of the individuals who examined optimistic had temperatures measured at 37.5˚C or increased after they got here to runner check-in on the occasion expo. In phone interviews Tokyo TMS Clinic docs discovered that whereas the bulk had been asymptomatic, 35 exhibited some signs corresponding to sore throat or fever, together with 11 who developed signs after having submitted their check samples. The asymptomatic numbers included individuals who had been shut contacts and people who had gone by way of quarantine following an infection however nonetheless examined optimistic for the virus.

On race day, Mar. 6, the town of Tokyo as an entire recorded 9,282 new circumstances, with a 7-day common of 10,995 and a positivity fee of 32.8%. For the week from Feb. 28 to Mar. 6, of 79,479 assessments carried out the variety of optimistic circumstances was 4,845, a suspected optimistic fee of 6.1%. This was consistent with charges of 5 to 7% within the 10 days earlier than the race at testing carried out at Tokyo TMS Clinic. 

Among the many 19,188 who began the marathon, none recorded temperatures of 37.5˚C or increased on race day. In post-race monitoring through the interval from Mar. 7 to twenty, two new optimistic circumstances had been present in subsequent PCR testing, indicating that no cluster infections occurred on the occasion and that there had been no false negatives amongst these examined pre-race. 

This was the primary try in Japan to conduct the identical PCR check on all individuals in a large-scale occasion, and within the midst of different measures corresponding to physique temperature and bodily situation self-monitoring designed to gradual the unfold of the sixth wave of infections, it was demonstrated that these measures alone are inadequate for stopping the participation of roughly 100 contaminated individuals in a discipline of 20,000. On the similar time, it was confirmed that efficient testing protocols primarily based on science could make it attainable to securely stage a big occasion with 20,000 individuals.

The 2023 Tokyo Marathon scheduled for Sunday, Mar. 5, 2023 will likewise be held in a protected and safe approach primarily based on the data and practices gained from the 2021 race. Purposes will open in mid-July, 2022.

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translated and edited by Brett Larner

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