At the end of September 2020, a study was published by a group of scientists at MIT University in Boston,
stating that the artificial intelligence model they had created could distinguish between coughs of asymptomatic COVID positive carriers induced at the request of researchers and coughs of healthy people.
The model is 98.5% accurate, which exceeds the accuracy of laboratory tests. PCR smear accuracy is 70-80% with preanalytical features taken into account. The Russian Institute of Physics of the Lebedev Russian Academy of Sciences also has a developed model, its accuracy is 89% today.