A study from Germany has found that face masks could reduce the number of new Covid-19 infections 20 days after their mandatory introductions anywhere from 15% to 75%. Researchers also found that the reduction in new cases was the most for those above 60 years of age. This is the first study to identify causal effects in a population, rather than in a clinical setting, highlighting the correlation between wearing face masks and a drop in new infections.
Face masks reduce new infections significantly, German study finds | COVID-19 Special
