How plankton hold secrets to preventing pandemics

Whether it’s plankton exposed to parasites or people exposed to pathogens, a host’s initial immune response plays an integral role in determining whether infection occurs and to what degree it spreads within a population, new University of Colorado Boulder research suggests. The findings, published May 13 in The American Naturalist, provide valuable insight for understanding and preventing the transmission of disease within and between animal species. From parasitic flatworms transmitted by snails into humans in developing nations, to zoonotic spillover events from mammals and insects to humans–which have caused global pandemics like COVID-19 and West Nile virus–an infected creature’s immune response is a vital variable to consider in calculating what happens next. “One of the biggest patterns that we’re seeing in disease ecology and epidemiology is the fact that not all hosts are equal,” said Tara Stewart Merrill, lead author of the paper and a postdoctoral fellow in ecology. “In infectious disease...