Travel restrictions violate international law
From China's lockdown of the city of Wuhan ([ 1 ][1]) to U.S. restrictions on travelers from Europe ([ 2 ][2]) to border closures across a widening range of countries ([ 3 ][3]), governments are increasingly seeking to limit freedom of movement in response to the coronavirus disease 2019 (COVID-19). These travel restrictions have slowed, but not halted, the spread of the pandemic (“The effect of travel restrictions on the spread of the 2019 novel coronavirus (COVID-19) outbreak,” M. Chinazzi et al. , Research Articles, published online 6 March, p. eaba9757). However, the necessity and benefits of this public health response are outweighed by its violation of international law. Under the International Health Regulations (2005) (IHR), binding on all World Health Organization (WHO) member states, health measures “shall not be more restrictive of international traffic and not more invasive or intrusive to persons than reasonably available alternatives” [([ 4 ][4]), art. 43]. Given the effectiveness of community-based public health measures such as social distancing ([ 5 ][5]) and contact tracing ([ 6 ][6]), the necessity of travel bans must be weighed against less restrictive a
