Immune and infectious diseases Archive

Some scientists believe that microbes might play a part in Alzheimer's disease development. They say it could be that certain viruses or bacteria that infect the brain aren't completely eradicated by the immune system, which leads to neuroinflammation and brain cell death. It could also be that microbes trigger the release of protein deposits-amyloid-beta plaques and tau tangles-which kill neurons, further increase neuroinflammation, and lead to more neuron death.

Avoiding germs that cause respiratory and gastrointestinal illnesses is especially important during the winter months, when cases are on the rise. Learn which strategies keep you safe.

Long COVID is the continuation or development of new symptoms three months after the initial infection from SARS-CoV-2 (the virus that causes COVID) without any other explanation. An estimated 6% to 11% of adults who have had COVID have long COVID. Researchers continue to learn about how it affects people and its possible long-term risks. The best protection against long COVID is avoiding COVID infection by getting vaccinated and wearing a mask in crowded areas.

While medical knowledge on celiac disease has evolved over the past few decades, there are still aspects that remain poorly understood. Perhaps not surprisingly, misconceptions are widespread among the general public.

A 2024 study involving more than 149,000 people, middle-aged and older, found that those who had shingles were 20% more likely to notice signs of cognitive decline years later, compared with those who didn't have shingles.

A diagnosis of influenza (flu) was linked to a sixfold risk of heart attack over the following week, according to a 2024 report.