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Table 2 Efficacy (ε) of isolation and quarantine given a fraction (F) asymptomatic (missed cases) and a fraction θ of transmissions before symptom onset

From: Household quarantine of second degree contacts is an effective non-pharmaceutical intervention to prevent tertiary cases in the current SARS-CoV pandemic

  1. R0 = basic reproductive number for SARS-CoV2
  2. ε = efficacy of isolation and quarantine (εI + εT); (3) ε > 1 – 1/R0 according to Fraser et al. [1]
  3. θ = fraction of transmission before symptom onset; (4) θR0 < 1 according to Fraser et al. [1]
  4. (5) gap = ε − εmax, the difference between ε needed according to ε > 1 – 1/R0 (column 3) and εmax, given a certain fraction of asymptomatic or missed cases; in case the gap is % + , this means a buffer of allowed insufficiency before ε > 1 – 1/R0 is reached
  5. (6) to (10) εeff resulting out of F(asymptomatic) in the general population + θ the fraction infected before the onset of symptoms; gap = ε − εeff
  6. Percentages are rounded up to the next whole number
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BMC Infectious Diseases

ISSN: 1471-2334

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