COVID-19 Archive

Ads for products that promise to supercharge the body's immune system make claims that sound too good to be true. But do these products actually work? 

RSV is a common virus that just causes cold symptoms for most people. But for infants up to eight months, and for babies and young children with certain health problems, it can be very dangerous. A new immune-boosting shot may help.

A 2023 study found that people who met guidelines for engaged weekly aerobic activity had a lower risk of dying from pneumonia or influenza than those who did no activity.

A 2023 study of more than 577,000 people found that people who said they met the guidelines for weekly physical activity had a 48% lower risk of dying from flu or pneumonia over a nine-year period, compared with people who said they didn't meet the guidelines.

News coverage of a case of leprosy in central Florida may have made it seem like there is an increased threat the disease would spread. Misconceptions about this disease have persisted for a long time, but the facts are reassuring.

While the FDA rules for blood donation were revised twice in the last decade, one group — men who have sex with men — continued to be turned away from donating. Now new, evidence-based FDA rules will focus on individual risk rather than groupwide restrictions.

Tens of millions of people who've had COVID-19 suffer with persisting symptoms. The condition is called long COVID. Symptoms, such as fatigue, difficulty concentrating, and disrupted sleep, can seriously impair the ability to function at work and at home. Vaccines and antiviral drugs appear to offer some protection against getting long COVID. But more information is needed. The National Institutes of Health has committed over $1 billion to discover how to better diagnose, effectively treat, and ultimately prevent long COVID.

Irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) are different, though they can have similar symptoms. IBS symptoms seem to arise from hypersensitive nerves and abnormal muscle contractions in the digestive tract, while IBD results from a problem with the immune system causing inflammation.

A rapid heart rate—tachycardia—is a key feature of postural orthostatic tachycardia syndrome, or POTS, a mysterious condition that involves the nervous system and can cause a constellation of symptoms, including fatigue, shortness of breath, headaches, and brain fog, as well as pain in the chest, extremities, or elsewhere in the body. At least half of all cases of POTS are thought to be triggered by an infection (such as mononucleosis), which then spurs inflammation or an autoimmune response. Treatment includes drinking lots of water, eating lots of salt, and graded exercise training.

Scientists are testing potential vaccines that aim to prevent urinary tract infections (UTIs). Until then, strategies that may help ward off UTIs include drinking lots of water each day, emptying the bladder after sexual intercourse, using vaginal estrogen creams (for women), wiping front to back after gong to the bathroom (for women), taking a daily long-term, low-dose antibiotic, taking a single dose of an antibiotic after sex (if recurrent UTIs often follow sexual intercourse), or taking cranberry supplements.