They say the eyes are windows to the soul. Science cannot prove that old saying true. Still, the eyes may reveal something unexpected: signs of Alzheimer’s disease.
Alzheimer’s is a form of dementia. Dementia affects memory, thinking, and social abilities. Doctors have long searched for earlier warning signs of the disease.
In pulpy adventure stories, one hero often stays behind. “Save yourselves,” they cry. “I’ll hold them off.” They may not survive. But if they fall, the enemy falls with them.
New research suggests certain immune cells in the brain behave in a strikingly similar way. When Toxoplasma gondii infects T cells, those cells can destroy themselves. In doing so, they eliminate the parasite hiding inside them.
The idea of a vaccine that shields against almost any infectious disease sounds mythical. Yet researchers at Stanford Medicine recently unveiled what they call a universal vaccine. This nasal spray could protect against COVID-19, influenza, bacterial infections, and allergies.
The spray primes immune cells in the lungs for future threats. In mice, it sharply reduced viral load. It also prevented severe symptoms and blocked allergic reactions.
Researchers tested it against coronaviruses, Staphylococcus aureus, and Acinetobacter baumannii. The latter two bacteria commonly spread in hospital settings. The vaccine also stopped allergic reactions to dust mites.
Human trials will determine whether these results translate. If successful, one nasal spray could replace several yearly shots.
The COVID-19 pandemic showed disease response variability. Many infections remained mild and short-lived. Other cases progressed into severe and life-threatening illness. These contrasts pushed scientists to investigate underlying causes.
Virus severity often differs from person to person. One infection may cause mild symptoms but hospitalize another. COVID-19, colds, and flu all show this pattern. Many visible and hidden factors drive these different outcomes.
Recent research explored hidden molecular patterns inside immune cells. Scientists studied gene molecules that guide immune responses. They found genetics and life experience shape immunity. These unseen traits influence how the body fights viruses.
Vaccine hesitancy often grows from misleading or conspiratorial claims. Yet, rare vaccine side effects can still occur. Previous research confirmed dangerous blood clots after some COVID-19 vaccinations. These clots appeared only after administration of adenovirus-based COVID-19 vaccines.
Scientists have now identified a likely cause of these symptoms, known as vaccine-induced thrombocytopenia and thrombosis (VITT). Their study was published in the New England Journal of Medicine. Researchers from Australia, Canada, and Europe collaborated on the new COVID-19 vaccine findings.
