Pathogen Variant Surveillance When to use Use current data when a question depends on which lineages appear in submitted sequences, what a lineage name currently means, or how the submitted sequence distribution changed. Never answer a current circulation question from remembered lineage names or old examples. This skill supports descriptive surveillance research. Counts describe sequences submitted to one database under stated filters; they are not case counts, infection prevalence, clinical interpretations, outbreak recommendations, or evidence of enhanced pathogen function. Verified scope…