Covid-19: Who fact checks health and science on Facebook?

@article{Clarke2021Covid19WF,
  title={Covid-19: Who fact checks health and science on Facebook?},
  author={Lars Clarke},
  journal={BMJ},
  year={2021},
  volume={373}
}
Overwhelming pressure from governments and the public has compelled social media platforms to take unprecedented action on what users share online in the pandemic. But who fact checks the fact checkers? Laurie Clarke reports