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Norovirus is one of the world's most contagious stomach viruses and can spread quickly through contaminated food, water, surfaces, and close contact with infected people. Symptoms usually appear within 12–48 hours and include sudden vomiting, watery diarrhea, stomach cramps, nausea, headache, and mild fever. While most people recover within a few days, dehydration can be dangerous for young children, older adults, pregnant women, and those with weakened immune systems. To reduce your risk while traveling, wash your hands with soap and water, drink safe bottled water, eat freshly cooked food, avoid raw seafood, and don't share utensils. If severe dehydration, persistent vomiting, or bloody stools develop, seek medical care immediately.

Forgetting appointments or misplacing everyday items doesn't always mean dementia. It could be mild cognitive impairment (MCI)—a condition where memory and thinking changes are greater than expected with aging but don't significantly interfere with daily life. Importantly, MCI does not always progress to dementia. Studies suggest many people remain stable, and some even regain normal cognitive function. Regular health checkups, managing conditions like diabetes and high blood pressure, staying physically active, eating a balanced diet, and keeping the brain engaged through learning and social activities can help reduce the risk of further decline. Early evaluation also allows doctors to identify and treat reversible causes of memory problems.

Researchers have discovered that people with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) have impaired glymphatic function—the brain's natural waste clearance system. Using MRI scans, the study found that reduced waste removal may allow harmful metabolic byproducts to accumulate, potentially triggering neuroinflammation linked to brain fog and other symptoms. The researchers also found that poorer sleep was associated with reduced glymphatic function, highlighting the vital role of sleep in maintaining brain health. While further research is needed, these findings provide a possible biological explanation for cognitive symptoms in ME/CFS and may help guide future diagnostic tools and targeted treatments.

A short daytime nap can boost energy and improve focus, but sleeping for more than 30 minutes may have the opposite effect, experts say. According to sleep specialists, the brain enters deeper sleep after about half an hour, making it harder to wake up. This can trigger "sleep inertia"—a groggy, sluggish feeling that reduces alertness and concentration for minutes or even an hour. Longer naps may also interfere with nighttime sleep by reducing your natural sleep drive. For the best results, experts recommend limiting naps to 10–20 minutes, allowing you to wake up refreshed without disrupting your regular sleep schedule.

The monsoon season increases the risk of food-borne infections due to higher humidity and faster food spoilage. Nutrition experts recommend eating freshly prepared, home-cooked meals such as dal, khichdi, vegetable soups, whole grains, and well-cooked protein sources like pulses, paneer, eggs, chicken, or fish. Choose fruits with protective peels, including bananas, oranges, pears, and pomegranates, and drink only boiled or purified water. Avoid street food, raw salads, cut fruits, undercooked meat, seafood, unpasteurized dairy, and leftovers left at room temperature. Experts emphasize that strong immunity comes from consistent healthy eating, proper hydration, and good food hygiene—not from any single superfood or supplement.

Researchers have identified a protein called "Mitch" that could become a promising new target for obesity treatment. In laboratory studies, disabling Mitch in human cells increased fat burning, boosted energy expenditure, and prevented immature cells from developing into fat-storing cells. Supporting these findings, mice lacking the protein remained lean, showed greater athletic performance, and were resistant to obesity despite conditions that normally promote weight gain. The discovery suggests Mitch acts as a key regulator of fat metabolism and storage. While the research is still in its early stages, it opens the door to future therapies aimed at treating obesity by increasing the body's natural ability to burn fat.

A new study suggests that a common type of stroke may not be caused primarily by fatty plaque buildup in the arteries, as long believed. Instead, researchers found a stronger connection with enlarged and damaged small blood vessels deep within the brain. This discovery could explain why standard treatments, such as aspirin, are often less effective for these patients. The findings also point toward a new treatment strategy focused on protecting and repairing the brain's tiny blood vessels rather than simply preventing blood clots. While more research is needed, this breakthrough could pave the way for more targeted and effective stroke therapies in the future.

A new pilot study explored whether adding ibuprofen to treatment for drug-resistant tuberculosis (TB) could improve patient outcomes. While the anti-inflammatory drug did not increase cure rates or improve lung recovery compared with standard TB therapy alone, researchers found it reduced several inflammatory markers linked to severe disease. These findings suggest ibuprofen may help regulate the body's immune response, although this did not translate into better clinical results in the small trial. Experts believe the low dose and limited number of participants may have influenced the outcome. Larger placebo-controlled studies are now needed to determine whether higher doses or similar host-directed therapies can improve treatment for drug-resistant TB.

A new Dutch study suggests that switching to a plant-based diet without careful planning may reduce intake of important nutrients, especially in older adults and teenagers. Researchers found that replacing common animal-based foods with plant-based alternatives lowered protein, essential amino acids, vitamin B12, calcium, iodine, selenium, and zinc intake, even when healthier plant-based options were chosen. While folate, vitamin E, and non-heme iron increased, some nutrients still remained below recommended levels. The findings highlight that plant-based diets can offer major health and environmental benefits, but choosing fortified foods and well-balanced protein sources is essential to avoid nutritional deficiencies during the transition.

New research published in Nature Communications suggests that Alzheimer's disease may first impair cognitive flexibility—the brain's ability to adapt, learn new rules, and adjust to changing situations—months before memory loss becomes noticeable. Using animal models, scientists found that overactive brain circuits linked to decision-making disrupted flexible thinking while memory remained intact. Encouragingly, calming these hyperactive pathways restored cognitive function and reduced amyloid-beta buildup, a hallmark of Alzheimer's disease. Although the findings still need confirmation in humans, they highlight cognitive flexibility as a promising early marker for diagnosis and a potential target for treatments aimed at slowing disease progression before irreversible brain damage occurs.