Focus on international and domestic travellers are equally important for successful SARS-COV-2 mitigation: ecological comparison of emigrant and migrant travel patterns and COVID-19 trends in Kerala State, India.

We posit from our ecological analysis of COVID-19 trends that the focus on returning international emigrants helped the Indian State of Kerala to successfully mitigate transmission from emigrants. However, the state’s failure to prevent SARS-COV-2 seeding by returning domestic migrants from other states of India led to extensive community transmission.