tetano
Editor, Senior Moderator
Science. 2020 Mar 6. pii: eaba9757. doi: 10.1126/science.aba9757. [Epub ahead of print] [h=1]The effect of travel restrictions on the spread of the 2019 novel coronavirus (COVID-19) outbreak.[/h]
Chinazzi M[SUP]1[/SUP], Davis JT[SUP]1[/SUP], Ajelli M[SUP]2[/SUP], Gioannini C[SUP]3[/SUP], Litvinova M[SUP]3[/SUP], Merler S[SUP]2[/SUP], Pastore Y Piontti A[SUP]1[/SUP], Mu K[SUP]1[/SUP], Rossi L[SUP]3[/SUP], Sun K[SUP]4[/SUP], Viboud C[SUP]4[/SUP], Xiong X[SUP]1[/SUP], Yu H[SUP]5[/SUP], Halloran ME[SUP]6,[/SUP][SUP]7[/SUP], Longini IM Jr[SUP]8[/SUP], Vespignani A[SUP]9,[/SUP][SUP]3[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Motivated by the rapid spread of COVID-19 in Mainland China, we use a global metapopulation disease transmission model to project the impact of travel limitations on the national and international spread of the epidemic. The model is calibrated based on internationally reported cases, and shows that at the start of the travel ban from Wuhan on 23 January 2020, most Chinese cities had already received many infected travelers. The travel quarantine of Wuhan delayed the overall epidemic progression by only 3 to 5 days in Mainland China, but has a more marked effect at the international scale, where case importations were reduced by nearly 80% until mid February. Modeling results also indicate that sustained 90% travel restrictions to and from Mainland China only modestly affect the epidemic trajectory unless combined with a 50% or higher reduction of transmission in the community.
Copyright ? 2020, American Association for the Advancement of Science.
PMID: 32144116 DOI: 10.1126/science.aba9757
Chinazzi M[SUP]1[/SUP], Davis JT[SUP]1[/SUP], Ajelli M[SUP]2[/SUP], Gioannini C[SUP]3[/SUP], Litvinova M[SUP]3[/SUP], Merler S[SUP]2[/SUP], Pastore Y Piontti A[SUP]1[/SUP], Mu K[SUP]1[/SUP], Rossi L[SUP]3[/SUP], Sun K[SUP]4[/SUP], Viboud C[SUP]4[/SUP], Xiong X[SUP]1[/SUP], Yu H[SUP]5[/SUP], Halloran ME[SUP]6,[/SUP][SUP]7[/SUP], Longini IM Jr[SUP]8[/SUP], Vespignani A[SUP]9,[/SUP][SUP]3[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Motivated by the rapid spread of COVID-19 in Mainland China, we use a global metapopulation disease transmission model to project the impact of travel limitations on the national and international spread of the epidemic. The model is calibrated based on internationally reported cases, and shows that at the start of the travel ban from Wuhan on 23 January 2020, most Chinese cities had already received many infected travelers. The travel quarantine of Wuhan delayed the overall epidemic progression by only 3 to 5 days in Mainland China, but has a more marked effect at the international scale, where case importations were reduced by nearly 80% until mid February. Modeling results also indicate that sustained 90% travel restrictions to and from Mainland China only modestly affect the epidemic trajectory unless combined with a 50% or higher reduction of transmission in the community.
Copyright ? 2020, American Association for the Advancement of Science.
PMID: 32144116 DOI: 10.1126/science.aba9757