Immune and infectious diseases Archive

Bacteria, parasites, and viruses can all cause food poisoning. Proper handling, cooking, and storage of food help reduce the chances of an infection. If you get food poisoning, it usually can be treated at home by replenishing lost fluids and electrolytes.

A cough that lingers for weeks after a cold can be confusing. Learn why it can persist, what else might be going on, and when to see your doctor.

Avoiding a painful shingles attack is reason enough to get vaccinated, but protecting your heart may be another. A major study found that people who received two doses of the Shingrix vaccine have a 9% lower risk of serious heart-related issues over seven years compared to those who got the old Zostavax vaccine.

A 2026 research review and meta-analysis suggests that regular stair climbing may lower people’s risks of dying of cardiovascular problems or any cause, as well as reduce the risks of heart attack, stroke, or heart failure.

Celiac disease affects everyone differently. While some people develop digestive symptoms, such as bloating and diarrhea, many adults also experience non-digestive symptoms, such as anemia or osteoporosis. Others have no noticeable symptoms despite intestinal damage.

The FDA approved Moderna's mFLUSIVA, the first mRNA flu vaccine, for adults ages 50 and older. Trials showed it outperformed traditional flu shots in preventing infection, though with a higher rate of side effects. It’s expected to be available in time for flu season.

A lower-than-usual white blood cell count is often temporary, especially after illness. Find out what your number may mean and when retesting might be needed.

Several factors increase the risk for complications from COVID-19 or influenza and should prompt someone to request an antiviral medication as soon as possible, even if they have been vaccinated or have had the infections before. The risk factors are age (being 65 or older), an impaired immune system, and underlying conditions (especially heart or lung disease). Pregnant women also are at increased risk for severe influenza and COVID, and should consider taking an antiviral.