The impact of vaccination status on importation of COVID-19 among international travellers.
Can Commun Dis Rep
; 47(11): 473-475, 2021 Nov 10.
Article
in English
| MEDLINE | ID: covidwho-1559833
ABSTRACT
Governments worldwide are looking for ways to safely enable international travel while mitigating the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and the associated coronavirus disease 2019 (COVID-19). However, few data describe the impact of vaccination on importation of COVID-19. We took advantage of the sequential introduction of two government policies in Canada to evaluate the real-world evidence of vaccine effectiveness among 30,361 international travellers arriving by air in Alberta, Canada. The proportion of COVID-19-positive results for travellers who were either fully vaccinated or partially vaccinated was 0.02% (95% CI 0.00-0.10) (i.e. one positive case among 5,817 travellers). In contrast, 1.42% (95% CI 1.27-1.58) of unvaccinated travellers tested positive for SARS-CoV-2 (341 cases among 24,034 travellers). These findings suggest that COVID-19 vaccinations approved in Canada, substantially reduced the risk of travel-related importation of COVID-19 when combined with other public health measures. The low absolute rate of infection among fully vaccinated or partially vaccinated international travellers may inform quarantine requirements in this population.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Type of study:
Experimental Studies
/
Prognostic study
Topics:
Vaccines
Language:
English
Journal:
Can Commun Dis Rep
Journal subject:
Communicable Diseases
/
Epidemiology
Year:
2021
Document Type:
Article
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