Epidemiological studies can be subject to biases including underdiagnosis, misdiagnosis, researcher bias, and healthy user bias.

“when you're looking at an epidemiology study do you have to be careful are there any problems with epidemiology you have to be careful of I'm clearly leading you on here whether whether how like underdiagnosed or misdiagnosed a disease is maybe right what about like bias you guys you guys heard of bias ethnicities race all that like there might not be enough research done in a certain area which is dominated by a certain race so yeah that can be a bias that researcher bias too right have you guys heard of healthy user bias healthy user bias no unhealthy user bias”