@Finnegenegen @ashishkjha @DLeonhardt A lot of transmissions in unstructured settings are hard to document. That was before genomic sequencing was available or used to establish specific transmission links (even now, uncommon), and the original virus in 2020 was less transmissible too.
@Finnegenegen@ashishkjha@DLeonhardt非结构化环境中的许多传输很难记录。那是在基因组测序可用或用于建立特定传播联系之前（即使是现在，也不常见），而2020年的原始病毒传播性也较低。