The fight against infectious diseases is an evolutionary arms race: Can pathogens mutate and evade our immune system’s defenses faster than scientists can develop effective diagnostics, therapeutics, and vaccines? Thanks to an ever-growing understanding regarding the nature of that clash, including its constantly moving goalposts, humans are managing to stay a step ahead of our microscopic assailants. Learn more in this in this installment of the COVID-19 discovery science Prequels.