Japan's "Patient Cluster Countermeasure Group" diligently traced all 61 cluster and superspreader events wwwnc.cdc.gov/eid/article/26…
see also @kakape's excellent thread
![](https://pbs.twimg.com/media/Eaf-Gy1U0AAaQwU.jpg)
journals.plos.org/plosone/articl… @PLOSOne
![](https://pbs.twimg.com/media/Eaf_g-9UEAARW--.jpg)
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