Odds of PML in MPDs is 0.07% = 6-7 patients per 9800!
So the odds of developing PML when diagnosed with a myeloproliferative disease (e.g. myelofibrosis) is 0.07%. This means that of the 9800 patients 6-7 are expected to develop PML regardless of treatment. It's like saying "10 people got in car accidents today after shopping at Target, so you better not shop at Target" ...come on, people, read the literature before arriving at ridiculous conclusions.