People who die of severe COVID-19 have brain abnormalities that resemble changes seen in Alzheimer’s disease – accumulation of a protein called tau inside brain cells, and abnormal amounts of the protein beta-amyloid that accumulates into amyloid plaques – small studies found. In other news, seniors can safely get the high-dose flu vaccine and an mRNA COVID-19 booster dose at the same time, a new study confirms.

At least 140 people said they had fallen sick after eating at a Chipotle Mexican Grill Inc. restaurant in Ohio, sending shares of the burrito chain down 8 percent in early trading.

Valeant Pharmaceuticals is under fire over a 2,700 percent price hike of a drug used to treat lead poisoning.