New MPIDR press out today on our PNAS Letter (published this week): www.pnas.org/doi/10.1073/...

Migration fell during the pandemic, but not in the ways we think.

Looking beyond total flows shows how border closures curtailed outflows, stranded migrants, and produced unintended consequences.

World map with interconnected lines and text about migration during the pandemic

Diagram shows estimated changes in the migrant population after a one-month travel ban for France, Germany, Italy, Spain, and the US by country of origin.

Estimate of the change in the migrant population due to a one-month travel ban in France, Germany, Italy, Spain, and the US by country of origin.

Jordan D. Klein & Ingmar Weber published a Letter to the Editor in Proceedings of the National Academy of Sciences that opens a conversation on the findings of Chi et al (Measuring global migration flows using online data). https://www.demogr.mpg.de/go/PNAS-Letter-Editor

GitHub - jordan-klein/covid19-mortality-gradients-brazil Contribute to jordan-klein/covid19-mortality-gradients-brazil development by creating an account on GitHub.

Data + code available here: github.com/jordan-klein...
#Epi #OpenScience #InfectiousDisease #HealthEquity

I show how structural inequities—not differential intervention uptake—likely drove death gaps. Targeting vulnerable areas for vax + equal NPIs could’ve flipped this dynamic.

Geo-spatial SEIRD model of counterfactual scenarios ➡️ fresh policy insight on making future outbreak control more equitable

Must Whatever Goes up Come Down? Mortality Gradients in the Emergence of COVID-19 According to fundamental cause theory, even as disease burdens shift, social inequalities in mortality persist. Yet for emerging infectious diseases, isolating the roles played by underlying social di...

Hey Bluesky! 👋 First post here. Just dropped a preprint of the 1st national-scale, data-driven mechanistic model of socio-economic inequalities in COVID-19 mortality in 🇧🇷 doi.org/10.1101/2025...