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22 april 2020

Impact assessment of non-pharmaceutical interventions against coronavirus disease 2019 and influenza in Hong Kong: an observational study - The Lancet

17-4; https://doi.org/10.1016/S2468-2667(20)30090-6
By: Cowling, et al. 

Investigate effectivity of Honk-Kong’s (severe) containment measures


  • Next to social distancing, travel restrictions etc. Hong Kong implemented frequent testing and isolation of positively tested patients. Close contacts of patients are also quarantined in special facilities. 
  • As of March 31 Hong Kong had 715 confirmed cases, 94 of whom were asymptomatic. 
  • Multiple surveys among Hong Kong residents showed good adherence to social distancing measures. 
  • Figure below shows implementation of Hong Kong measures, the second figure shows the number of cases and the Rt (= number of patients infected by one confirmed case, below 1 indicates a decline in disease, above 1 indicates the disease tends to grow). 
  • The figures show the Rt remained around 1, indicating the disease is not growing further after implementation of containment measures.