Correction to: Nature https://doi.org/10.1038/s41586-018-0012-7, published online 04 April 2018.

In this Article, author Li Liu should be associated with affiliation number 5 (College of Marine Sciences, South China Agricultural University, Guangzhou, Guangdong, China), rather than affiliation number 4 (Wenzhou Center for Disease Control and Prevention, Wenzhou, Zhejiang, China). This has been corrected online.