Immune and infectious diseases Archive

Air pollution is an often overlooked yet important contributor to cardiovascular disease. Tiny particles known as PM_2.5 travel deep into the lungs, where they irritate receptors and trigger nerves involved in the autonomic nervous system. This irritation also contributes to inflammation, which accelerates atherosclerosis. Climate change can worsen the damaging effects of air pollution in several ways, such as by promoting wildfires and dust storms, which creates more PM_2.5. To reduce pollution's harmful effects, people can check air quality information and use portable indoor air cleaners when pollution levels are elevated.

Chronic stress is bad for health. It can trigger physical problems, including chronic inflammation—the persistent activation of the immune system, which sharply raises the risks for many diseases such as dementia, heart disease, or stroke. Ways to reduce stress include living a healthy lifestyle, doing relaxation exercises, stretching, being mindful, taking a brisk walk, reducing loud noise, using laughter, playing soothing music, countering negative thoughts, reaching out for help from a loved one, and using positive self-talk.

Probiotics can be helpful in some cases, but it's unclear whether they are safe for all older adults.

A recent analysis found evidence mixed on whether zinc can help prevent or treat a cold. However, there appears to be no significant harm from taking over-the-counter zinc products in safe amounts per the label's instructions.

Increasingly, tests that measure C-reactive protein are marketed to health-conscious consumers as a way of determining if they have chronic inflammation. However, the test is just one piece of evidence and should be interpreted by one's doctor. Without that expertise, a customer might not understand what the CRP test result means, and as a result might suffer unnecessary anxiety or pursue unnecessary tests. It's best to talk to one's doctor before seeking tests that measure CRP levels.

Research shows that a diet rich in anti-inflammatory foods, such as fruits and vegetables, healthy oils, and whole grains, may help prevent some joint problems, such as gout or even osteoarthritis. The benefit is less pronounced if a person has joint problems already. Diet cannot reverse joint problems completely, but it may help with disease management in combination with other treatments.

Many cancers might be avoided if people did at least five hours of moderate-intensity exercise per week like brisk walking, biking riding, and water aerobics.

U.S. adults who report being physically active say their most frequent forms of exercise are walking, gardening, and weight lifting, according to a study published online Oct. 8, 2021, by the CDC's Morbidity and Mortality Weekly Report.

Men are less likely than women to get regular exams and tests, especially when they are younger. But as they age, routine screenings are essential. There are certain tests most men should have at some point, including ones for colon cancer, high blood pressure, hepatitis C, diabetes, and HIV. Other tests men should consider if they are at high risk for specific ailments, such as abdominal aortic aneurysm, hepatitis B, and lung cancer.