20 points
O.01% of the population, roughly 1 person in 10,000. https://en.wikipedia.org/wiki/Situs_inversus
6 points
5 points
Sure, round figures, lets call it 800K. And I bet the vast majority of them knows. It doesn’t take much of an examination for a doctor to determine location of heart and liver.
2 points
*
In fact many of them don’t, since the body is mostly symmetrical and apart from cutting them open or doing an MRI, you can’t really tell (which isn’t a big deal in most cases, because most medical procedures work regardless of this condition). Also, the heart is located almost in the middle, so there is not much difference.