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0 Marc Lipsitch [1]In my view, there are many, many things wed like to know, but there are two in particular that I think are really essential. One is to understand what role, if any well, what role probably there is some children play in transmitting this epidemic. So what we do know is that children are underrepresented.Number two is understanding the size of what we sometimes call the iceberg, that there arewe see preferentially those people who are most severe, in part because, as Paul said, those are the people who are most likely to get tested, and then there is this pyramid or iceberg underneath those, people who are mildly ill or even asymptomatically infected. COVID-19 CT [2] Nature 50%[3] ()[4][5]Conclusions: In the close contacts of COVID-19 patients, nearly half or even more of the asymptomatic infected individuals reported in the active nucleic acid test screening might be false positives. 19.67% 80.33%47% 75% CT 2 3 23 [6] 712 331 587 277 30 [7] 3%Early results from deCode Genetics indicate that a low proportion of the general population has contracted the virus and that about half of those who tested positive are non-symptomatic, said Gunason. The other half displays very moderate cold-like symptoms.[8][9][10] 2