Crypto is caused by dehydration. You have to wait for the dino to dehydrate to catch the disease, at which point it unlocks in the research, medications. Research it then send MVU team to cure. At some point the Crypto inoculation unlocks, research that, then all dinos will nolonger get the disease,as above, managed to fix up allosorus, but all dinos in washington now have cryptosporidium, and no option to research/ option to build centre, will improving habitat stop it.