![Figure 1. Illustration of an example of current common approach for determining PRRSV variant within a farm (left panel), and our proposed assessment to determine PRRSV resident virus variability (right panel).](https://www.pig333.com/3tres3_common/art/pig333/19808/home.jpg?w=650&h=366&ho=1&t=1701346786)
How many PRRSV types can we detect in a swine farm during a single-day sampling event?
Too often a single sequence information is used to make important conclusions regarding virus source, especially for new PRRS outbreaks, guiding outbreak investigations, and future interventions.