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Table 2 Characteristics of secondary cases belonging to each of the SARS-CoV-2 school clusters (n = 24)

From: SARS-CoV-2 outbreaks in secondary school settings in the Netherlands during fall 2020; silent circulation

  1. aBased on school contacts who shared (class) rooms for at least two course hours in the recent 14 days
  2. bDay 0 is set at the date of the first sample for each subject. Some sampling rounds were spread over 2 days, therefore days between exposure to index and first sample may vary per subject
  3. cDefined as infections in household members detected after day 0
  4. dA household member of this case tested positive in the 2 weeks before study initiation
  5. eNo symptom data available
  6. fHousehold member tested positive but within 24 h after the student’s result