I enclose a list of Asymptomatic infections. https://en.m.wikipedia.org/wiki/Asymptomatic
Included in the list is Covid-19 which states that the majority of cases are asymptomatic.
This means that the Covid-19 virus will never be eradicated as long as people continue to be carriers for this disease but show no symptoms of having the Covid-19 virus.
Wearing masks or standing two metres apart in shops and public buildings or leaving windows open on buses is not going to stop the spread of the Covid-19 virus.
An asymptomatic person walking past you in the street could give you the Covid-19 virus because a person who is asymptomatic for the Covid-19 virus are unaware that they are a carrier in the first place.