SCIENTISTS RECENTLY DETECTED POLIO IN NEW YORK CITY WASTEWATER, the New York Times reported on August 12, 2022.

Vaccination is associated with a nearly halving (40 percent drop) in the risk of Alzheimer’s disease over four years.

Hepatitis is an inflammation of the liver. Viruses cause most cases of hepatitis. The type of hepatitis is named for the virus that causes it; hepatitis A, hepatitis B, hepatitis C, hepatitis D and hepatitis E.

There has always been uncertainty over how long immunity from SARS CoV-2 infection lasts. Is it three months? Six months? A year? Lifelong? Studies...