The US National Institutes of Health (NIH) has terminated nearly 800 research projects at a breakneck pace, wiping out significant chunks of funding to entire scientific fields, finds a Nature analysis of the unprecedented cuts.

The administration of US President Donald Trump began purging NIH-funded studies on topics that it deems problematic less than 50 days ago, continuously expanding its list to include research on topics ranging from COVID-19 to misinformation. Hundreds of the 30,000-plus scientists funded by the NIH yearly have been forced to halt their work after receiving notices that their research “no longer effectuates agency priorities”, and some have had to fire personnel or even shut down their laboratories.