Immune and infectious diseases Archive

COVID survivors—even those with mild infections—appear to face a higher risk of cardiovascular problems such as heart failure, heart attack, and stroke for up to one year after their initial infection. People who were hospitalized (especially those who ended up in the intensive care unit) may have the highest risk. The virus that causes COVID can injure blood vessels and triggers an immune response that promotes the formation of blood clots in arteries and veins throughout the body and brain.

A troubling aspect of COVID infection is long COVID, also known as post-acute sequelae of SARS-CoV-2 infection, or PASC. PASC is marked by persistent symptoms 30 days or more after a person tests positive for COVID. Also, symptoms suggestive of PASC may emerge many weeks after recovery from the initial infection. Scientists are still learning about PASC, but they have discovered much so far, such as who may be at higher risk, what symptoms are common, how long it may last, and what people can do to protect themselves.

Despite how it may sometimes seem, the COVID-19 pandemic is very much still with us. This is a good time to pause and assess where we are now and what you need to know about vaccines, boosters, and other measures to help you stay well.

Two important types of fat in the body are white fat and brown fat. White fat is located in the chest, abdomen, and upper legs; too much of it constitutes obesity. Its function is to provide insulation against the cold, store fats derived from food, and continually release small amounts of the fats to be converted into energy. Brown fat is found in small amounts in the neck, shoulders, chest, and abdomen. Its main function is to burn the fat it stores, creating heat that keeps the body warm.

In the past, people with lupus were advised to avoid pregnancy because doctors believed it was too risky. That's no longer true: in most cases, following expert guidelines can make a successful pregnancy possible. It's wise to think ahead, and to be aware of some important issues.

In January 2022, the CDC published updated recommendations for vaccinating adults against pneumococcal disease and approved two new pneumococcal conjugate vaccines (PCVs).

After all we've been through during the last couple of years, many families and kids are looking forward to being able to return to summer camp. But COVID-19 is still with us and parents need to consider this as they make plans for safe and fun summer activities.

A 2022 Harvard study suggests that an Epstein-Barr virus infection, the most common cause of mononucleosis, may trigger multiple sclerosis (MS) in some people.

Hair loss is a common problem for many men and women, but what does it mean to have alopecia? Alopecia areata occurs when the body's immune system attacks hair follicles, resulting in hair loss. AA can affect the scalp, eyebrows, eyelashes, or anywhere hair grows on the body.

The blood supply in the US is critically low, but FDA guidelines prohibit men who have sex with men from donating blood if they have been sexually active in the previous three months. All donated blood is tested for a number of transmissible infections, and medical organizations are calling for this policy to be changed.