Correction to: npj Vaccines https://doi.org/10.1038/s41541-019-0119-3, published online 25 June 2019

The original version of this Article contained an error in the spelling of the author Ahmad Nazri Mohamed Naim, which was incorrectly given as Ahmad Nazri Hohamed Naim. This has now been corrected in both the PDF and HTML versions of the Article.