In Sweden, upper-secondary schools moved online while lower-secondary schools remained open during the spring of 2020. A comparison of parents with children in the final year of lower-secondary and first year of upper-secondary school shows that keeping the former open had limited consequences for the overall transmission of the virus. However, the infection rate doubled among lower-secondary teachers relative to upper-secondary ones.
from Latest Science News -- ScienceDaily https://ift.tt/3dcWuQ3
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