Volume 595 Issue 7865



Why Uruguay lost control of COVID p.21

Complacency and a coronavirus variant help to explain why the country, once a pandemic success story, couldn’t withstand the surge now rocking South America.

doi: 10.1038/d41586-021-01714-4

News Features

News & Views

Programmable capillary action controls fluid flows p.31

A technological platform has been developed in which millimetre-scale cubes are assembled into 3D structures that control capillary action — enabling programmable fluid flows and modelling of a range of fluidic processes.

doi: 10.1038/d41586-021-01708-2

Designer fibre meals sway human gut microbes p.32

Understanding how diet affects gut microbes and thereby influences human health might lead to targeted dietary strategies. A clinical trial now provides some steps on the path towards this goal.

doi: 10.1038/d41586-021-01601-y