Legionnaires’ kills 1 in Bx.

VISITORS TO Rikers Island have two new free travel options courtesy of the Correction Department.

The de Blasio administration Wednesday launched a free express bus service that leaves from designated spots in Harlem and downtown Brooklyn.

The two buses, driven by city Correction Department AN ELDERLY Bronxite died after contracting Legionnaires’ disease in Co-op City, the city’s Health Department announced Wednesday.

Two other Co-op City residents, who live in connected buildings, also became sick but have since been released from hospital, health officials said.

The city is checking the complex’s plumbing in an effort to identify the source of the disease, because the buildings do not have a cooling tower.

“Residents of this building who are over 50 or have underlying medical conditions should avoid showering until the investigation is completed,” the Health Department said.

Legionnaires’ disease causes high fevers and serious respiratory ailments. It is not contagious through personal contact but is commonly spread through the air.

The illness can be treated using antibiotics for pneumonia. But it can be fatal for people with compromised immune systems.

“As always, adults with flu-like symptoms, fever, cough or difficulty breathing should seek immediate medical attention,” the Health Department said. “Legionella testing should be considered by clinicians based on history, symptoms and other findings.”

In 2015, a Bronx outbreak killed a dozen people and sickened 127 others.