encephalitis who were young (mean 39, range 19–45) and otherwise healthy. Exon
capture was performed with the Agilent SureSelect Target Enrichment System (Santa Clara,
CA), and sequencing was performed on the Illumina (San Diego, CA) platform using standard
manufacturer protocols. Reads were aligned to human genome build 37 with BWA 36 and processed with SAMtools 37 (link) and the Genome Analysis Toolkit 38 (link). Variant calling was performed using the
UnifiedGenotyper and the VCFs were annotated with snpEff and the ENSEMBL annotation
database 39 (link). Filtering models for SNPs
and InDels were independently trained using the Variant Quality Score Recalibration
module. We set passing thresholds at values corresponding to filtration of less than
0.5% of known, high-confidence SNPs and InDels.