Travel‐related control measures to contain the COVID‐19 pandemic: a rapid review
Review (36 studies) notes that with much of evidence derived from modelling studies, notably for travel restrictions reducing cross‐border travel and quarantine of travellers, there is lack of 'real‐life' evidence for many of these measures & certainty of evidence is very low.
Source:
Cochrane Database of Systematic Reviews
SPS commentary:
It suggests nevertheless, that broadly, travel restrictions may limit the spread of disease across national borders. It notes that entry and exit symptom screening measures on their own are not likely to be effective in detecting a meaningful proportion of cases to prevent seeding new cases within the protected region; but combined with subsequent quarantine, observation and PCR testing, the effectiveness is likely to improve.