A superspreading event is an event in which an infectious disease is spread much more than usual, while an unusually contagious organism infected with a disease is known as a superspreader.

What is the difference between presymptomatic and asymptomatic cases of COVID-19?

A presymptomatic case of COVID-19 is an individual infected with SARS-CoV-2 who has not yet exhibited symptoms at the time of testing but who later exhibits symptoms during the course of the infection.

An asymptomatic case is an individual infected with SARS-CoV-2 who does not exhibit symptoms at any time during the course of infection.

What does it mean that someone is asymptomatic?

Someone who is asymptomatic has the infection but no symptoms and will not develop them later. Someone who is pre-symptomatic has the infection but does not have any symptoms yet.