Is "novel" the right criteria here? If Covid didn't have asymptomatic/pre-symptomatic infectiousness, it'd still be novel but may not have become a pandemic. Th

Is "novel" the right criteria here? If Covid didn't have asymptomatic/pre-symptomatic infectiousness, it'd still be novel but may not have become a pandemic. Therefor may not have even been noticed, no tests developed for it, etc...