Queen's Crown is an anime which aired in 2018 on [adult swim].
After a biohazard problem causing a disease called Infectio Cerritum, the mayor of a town is murdered. Without orders, scientists couldn't contain the disease easily and it evolved, turning citizens infected into monsters.
A year later, a man named Ezekiel decides to move out of town. It turns out that Ezekiel was the man who murdered the mayor a year ago. However, the taxi driver who is driving Ezekiel out of town was infected too. This causes the disease to spread to the new town Ezekiel moves to as well. The main story is set around Ezekiel trying to get away from those with the disease, while trying to find a cure along side it.