The concept of asymptomatic transmission formed the foundation for the belief that lockdown was necessary and might work and for mask wearing and amplified the atmosphere of fear with the idea that anyone could be a threat.
… At the time it was possible to conclude that the global evidence of transmission from people who never had symptoms amounted to only three people with very mild symptoms, calling into question the idea that there should be any concern around the apparently healthy.
In the last year there have been two reports which have increased knowledge in this area. The first was a study of thoroughly tested marine recruits and the second was a carefully reported outbreak in Japan. Both studies failed to provide answers to critical questions – the key question being whether someone who tested positive after contact with a never symptomatic individual, ever developed symptoms themselves. This question has been repeatedly omitted from such studies of asymptomatic spread.