explained-explained-what-is-serial-interval-and-how-can-it-be-managed-to-control-covid-19-ie

What is serial interval?

  • The serial interval is the duration between symptom onset of a primary case and symptom onset of secondary cases (contacts) generated by the primary case. 
  • In simple terms, the serial interval is the gap between the onset of Covid-19 symptoms in Person A and Person B, who is infected by Person A. 

What does changes in serial interval indicate?

  • The serial interval helps to gauge the effectiveness of infection control interventions besides indicating rising population immunity and forecast future incidence. 
  • Thus, the more quickly persons who contracted Covid-19 are identified and isolated, the shorter the serial interval becomes and cuts down opportunities for transmission of the virus.
  • To manage serial interval, a robust system of contact tracing, quarantine, and isolation protocols should be in place.