Correction to: npj Vaccines https://doi.org/10.1038/s41541-021-00424-2, published online 10 January 2022

In the original version of this Article, images from Fig. 7c column PV-1950D were mistakenly duplicated in Fig. 7a column PV-1950D. The figure has been corrected in both the PDF and HTML versions of this Article.