By Jason Gale / Bloomberg April 18, 2024 9:30 PM EDT A Covid-19 patient with a weakened immune system incubated a highly mutated novel strain over 613 days before succumbing to an underlying illness, researchers in the Netherlands found. The patient, a 72-year-old man with a  blood disorder , failed to mount a strong immune response to multiple Covid shots before catching the omicron variant in February 2022. Detailed analysis of specimens collected from more than two dozen nose and throat