The largest study of household transmission showed that ‘cases’ (people with a positive PCR test) without symptoms led to a family member becoming positive on just 0.7% of occasions. This is in the intimacy of home & made no account of the false positive background rate in the test, often considered to be around 1%.
By contrast, those with symptoms led to a family member becoming positive on 17% of occasions
Of the secondary ‘cases’ ONLY those in contact with a symptomatic ‘case’ themselves became symptomatic.
It's almost like basic GCSE Biology?!
Full study here.
Watch videos of multiple experts dismissing asymptomatic transmission: