Analysis of variation within individual COVID-19 samples using bowtie2, bwa, fastp, multiqc , picard ,samtools, snpEff Workflow, tools and data are available on https://github.com/fjrmoreews/cwl-workflow-SARS-CoV-2/tree/master/Variation This worklow was ported into CWL from a Galaxy Workflow ( https://github.com/galaxyproject/SARS-CoV-2/tree/master/genomics/4-Variation migrated to CWL).