POLIO

The CDC is expanding its Polio testing to include wastewater in Michigan and Pennsylvania. So far there has only been one case of paralytic Polio, found in New York.

The Bill & Melinda Gates Foundation announced Sunday that it will contribute another $1.2 billion to efforts to eradicate polio around the world.

The highly infectious viral disease can lead to permanent paralysis of the arms and legs and even death in some cases. Health officials are urging people to get vaccinated if they haven't been.

First- and second-graders line up for Salk Polio vaccine shots on April 23, 1955. Regardless of where anyone stands on the matter, we know that vaccinations have been protecting us from diseases for decades. In 1921, the United States recorded 206,000 cases, which resulted in 15,520 deaths, according to the History of Vaccines website. According to the CDC, polio was once one of the most feared diseases in the U.S. Since 1979, there have been no polio cases that originated in the U.S.

A conversation with Jeff Fager and Michael Radutzky about the 60 Minutes story that followed cancer patients treated with polio