Mucin genes are also known the exhibit somewhat pervasive genomic complexity and evidence of heterogeneity between populations, thus, to ensure that this signal is not just an artefact of this, we performed a phenome-wide association study (pheWAS) of the lead SNP in the IEUGWAS database and found that this variant was associated with predominantly respiratory phenotypes relevant to pneumonia. This evidence concerns the gene MUC5AC and susceptibility to pneumonia measurement.