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Alessandro Ferretti is a researcher in the Department of Physics at the University of Turin. On his blog he published an interesting analysis on the trend of infections in Piedmont based on data obtained by the regional councilor Francesca Frediani.
Here are the data, valid for Piedmont, as of September 18, divided by week, by type of school (nursery, childhood, primary, first and second grade of secondary) and by province.
ALL THE INFORMATION
Here are some excerpts from Ferretti’s analysis: “Despite increased precautions introduced since the beginning of the school year in secondary schools, the incidence of infection among staff has been significantly higher than in the general population since the week of October 12. The percentage of infections continued to grow to 125% of that of the general population in the week of October 26, when distance education was introduced for at least 50% of the teaching hours from second to fifth “
Still: “The incidence of contagion among middle school staff has exceeded that of the population as of the week of October 12: Compared to the case of high schools, however, growth was much faster and in In the week of November 2, the percentage of infections among the personnel reached 280% of that of the population, which corresponds to an incidence of contagion almost three times higher.
So: “In elementary school the trend is similar to that of middle schools: the rise was a little less rapid but in the week of November 2, the incidence of infection in staff still reached 270% of that of the population “.
Finally: “The percentage of infections among nursery staff is the highest of all. In the week of November 2, the percentage of infections reached 360% of that of the population, but in the absence of restrictive measures, it continued to grow and in the week of November 23 it reached almost 400%, or four times the incidence in the population. general. Adding up the infections each week, 10.8% of the workforce was infected ”.
His conclusions: “The fact that the incidence of contagion among school personnel is significantly higher than general is an indication of the fact that such personnel are more exposed to infection than the average population. If schools were not a place where infection occurs, an incidence similar or lower than that of the population would be expected. Given that the only relevant difference between school personnel and the general population lies in the particular work activity, it is evident that the cause of greater incidence lies in the work itself ”.
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On Twitter the physicist Roberto battiston, a professor at the University of Trento and former director of the Italian Space Agency, relaunched Ferretti’s research with this comment: “This analysis is the best in Italy that I have read so far on the school’s COVID data. It only refers to Piedmont, but it is very precise. I hope that the same data is accessible for each of the 21 Italian regions / PAs ”.
The president of the Region, Alberto Cirio, spoke in the morning with Orizzonte Scuola about the epidemiological situation in Piedmont.
Cirio: “In Piedmont there are too many cases among students, that’s why we keep them closed. This is how the reopening will be ”. To the minister I say: “Let’s work together” [INTERVISTA]
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