PLoS One
http://www.plosone.org/
[Accessed 15 May 2021]

Exposure misclassification bias in the estimation of vaccine effectiveness
Ulrike Baum, Sangita Kulathinal, Kari Auranen
Research Article | published 13 May 2021 PLOS ONE
https://doi.org/10.1371/journal.pone.0251622