Tagged with #mappingqualityzerofilter
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Hello GATK team,

BaseRecalibrator applies the filters: DuplicateReadFilter MappingQualityZeroFilter I've noticed that in the bam after PrintReads, most of those reads indeed filtered out, but few of them were left - about 2% reads that were marked as dups by picard, and 4% reads with a mapping quality zero.

What exactly happens when a tool applies a filter?