Vo was a village in Italy where the first person in Europe died from Covid-19. This paper outlines that 40% of the people that got tested positive were asymptomatic. It is noteworthy that 73 people tested positive in the first and only 29 people tested positive in the second survey. Since 8 of them were new, this study is based on 81 individuals. That is a number that would make me uncomfortable. It is interesting, but the margin of error could be high. Just a couple of families with some weird genetic effect and you have completely different results for instance.