Immune and infectious diseases Archive

Hives are red, itchy welts that crop up on the skin. Allergic reactions and stress, among other triggers, can cause episodes of hives, which typically last several days to a couple of weeks. Cases that last six weeks or longer may be autoimmune hives.

People who have had shingles have a 30% increased risk for heart disease and stroke, says a new Harvard study. Learn more about the risk.

Infertility affects millions of people worldwide. Chronic inflammation has been linked to many health conditions and some research suggests it might be a contributing factor for some cases of infertility. And if true, would an anti-inflammatory diet or lifestyle boost fertility?

Cervical cancer is curable when caught early through routine screening, so research showing a surprising rise in advanced cancer cases in some groups is worrisome. Two Harvard experts share insights about the research and advice on how people can best protect themselves.

Certain healthy habits can fight chronic inflammation, such as eating a healthy diet, exercising regularly, getting enough sleep, maintaining good oral health, and reducing stress. If adopting all those habits seems daunting, taking little steps in their direction can help. For example, a person might eat fatty fish twice a week, since it contains omega-3 fatty acids known to reduce inflammation; or go for a quick daily walk, since exercise may increase the production of hormones that help keep inflammation in check. The combined effects of many little habits can eventually add up to keep people healthier.

A fever is the immune system's response to an infection or invader. Most fevers drop after people take over-the-counter medications. People should call a doctor if their fever reaches 103° F and go to an emergency room if it reaches 105°.

Fermented foods and drinks such as kimchi, kombucha, and tempeh are increasingly popular, adding to mainstays such as yogurt, sauerkraut, and beer. Heat and bright lights during manufacturing can destroy some beneficial probiotics. Fermented products can ease digestion, dampen inflammation, boost nutrient absorption, and battle harmful bacteria. People should look for product labels that say "live and active cultures" and avoid shelf-stable versions, which don't contain probiotics.

Genes that helped people survive during the time of the Black Death are more likely to be found in people with autoimmune diseases alive today. Does this tell scientists anything about what surviving the COVID-19 pandemic might mean for the world's population?

The routine yearly medical check-up is now more often referred to as the annual wellness visit, which allows people to formulate detailed health goals with their doctor and design plans to meet them, as well as assess the possibility of life-changing events, like heart attack, stroke, and cancer.

Wintertime can pose challenges to cardiovascular health. Cold temperatures can cause arteries to narrow, which can leave people with heart disease vulnerable to angina or heart attacks, especially during physical exertion. Changes in sleep, eating, and exercise habits related to the season may also affect the heart. Crowded indoor gatherings also raise a person's risk for respiratory infections, which can exacerbate heart disease.