This is one thing that we know for sure Alexa can’t do. Don’t get us wrong; Alexa can help you screen for some diseases. For instance, she can lead you in checking yourself for flu-like symptoms. But Alexa can’t actually tell you if you have a disease. She can only help you rule it out through a lack of symptoms. If you do have telltale symptoms for an illness that requires treatment, you need to contact a medical professional, stat.