Commentary
Karol Sestak*
Abstract
This commentary article focuses on biological parallels between Porcine Respiratory Coronavirus and Severe Acute Respiratory Syndrome Coronavirus-2 pandemics. Emphasis is on spread, antibody (humoral) immunity and need for development of highly accurate, virus-specific antibody assay capable to differentiate between antibodies induced by newly emerged COVID-19 coronavirus and those induced by other, closely related coronaviruses.