I know that DNA analysis is used in forensic science, but I had no idea that it helped with epidemics and human history too. How is DNA used in these cases specifically?
For example, in food-borne illness, how can DNA research help? I guess we're talking about the DNA of the illness causing bacteria right? Is this like finding out how Mad Cow Disease bacteria spread to animals and humans? By seeing how the DNA mutated?
This is so interesting. I used to think that DNA is just important for biology class or for the police. I didn't know it had so many different uses.