Why are we still talking about travel restrictions for COVID-19?
First, proof of a negative test is no guarantee that someone is not infected; a Canadian study from 2020 showed that more than a third of travel-associated cases test negative initially, before producing a positive resultPCR tests may be positive for weeks after people are infectious, especially during a period of significant transmission, thereby throwing travellers who pose no threat in limbo.
Indeed, in March, 2022, Hong Kong’s relaxed COVID-19 policies contributed to widespread transmission of the BA.
Finally, if there are minimal domestic measures within a given country, then an individual’s risk of infection is far higher from a local contact than through a traveller. These restrictions thus cause disproportionate pain to those faced with restrictions.
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