citation please.Larssen wrote:
I mean the teachers among eachother rather than with kids. In any case, research in both Belgium and the Netherlands has stated children are much less likely to catch the virus let alone spread it. They aren't the feared superspreaders. Within families spread didn't happen because of infected children.uziq wrote:
the thinking is that children can become 'super-spreaders', essentially dosing the adults with whom they come into contact with huge amounts of the virus. the fact they don't get seriously sick with it doesn't mean they aren't capable hosts.
once you let classrooms of 20-30 children mix, you are effectively stirring a petri dish of 20-30 households. who then all go home and have close contact with their parents, at the very least, and other immediate family. you can't social distance from a kid. they are not independent adults.
lancet article (arxiv prepress) on a big cohort in china states that children are susceptible and do spread.
https://www.medrxiv.org/content/10.1101 … 20028423v3
further, behaviourally, children are far more gregarious and in-contact than working-age adults. this is a factor in modelling the r0 factor. as i said, 20-30 children together in a classroom/playgroup at school are a much bigger risk for transmission than atomised working adults.Household contacts and those travelling with a case were at higher risk of infection (ORs 6 and 7) than other close contacts. The household secondary attack rate was 15%, and children were as likely to be infected as adults. The observed reproductive number was 0.4, with a mean serial interval of 6.3 days. Interpretation Our data on cases as well as their infected and uninfected close contacts provide key insights into SARS-CoV-2 epidemiology. This work shows that heightened surveillance and isolation, particularly contact tracing, reduces the time cases are infectious in the community, thereby reducing R. Its overall impact, however, is uncertain and highly dependent on the number of asymptomatic cases. We further show that children are at similar risk of infection as the general population, though less likely to have severe symptoms; hence should be considered in analyses of transmission and control.
https://www.nytimes.com/2020/05/05/heal … chool.htmlIn one study, published last week in the journal Science, a team analyzed data from two cities in China — Wuhan, where the virus first emerged, and Shanghai — and found that children were about a third as susceptible to coronavirus infection as adults were. But when schools were open, they found, children had about three times as many contacts as adults, and three times as many opportunities to become infected, essentially evening out their risk.
Based on their data, the researchers estimated that closing schools is not enough on its own to stop an outbreak, but it can reduce the surge by about 40 to 60 percent and slow the epidemic’s course.
“My simulation shows that yes, if you reopen the schools, you’ll see a big increase in the reproduction number, which is exactly what you don’t want,” said Marco Ajelli, a mathematical epidemiologist who did the work while at the Bruno Kessler Foundation in Trento, Italy.
Last edited by uziq (2020-05-08 03:26:02)