After Mayor Bill de Blasio’s announcement of a vaccine mandate for city workers, police union heads say they will take legal actions to oppose the mandate and protect the rights of their employees. On Wednesday, de Blasio said any city worker who is not vaccinated with at least the first dose of the vaccine by 5 p.m. on Oct. 29 will be put on unpaid leave, prompting police unions to fight back. Police Benevolent Association President Patrick J. Lynch said in a statement Thursday that his organization will go to court to protect his employees’ right to make their own medical decisions. “From the beginning of the de Blasio administration’s haphazard vaccine rollout, we have fought to make the vaccine available to every member who chooses it, while also protecting their right to make that personal medical decision in consultation with their own doctor. Now that the city has moved …