Harvard Health Blog

Despite the effectiveness of the COVID-19 vaccines, a small number of people develop cases even after being fully vaccinated. Most of these "breakthrough" cases are mild or moderate, and the CDC has decided to track only the ones that require hospitalization, which has disadvantages.

Menstruation is a basic fact of human existence, yet millions of people in the US struggle to afford –– or can't afford –– products like tampons and pads, a problem known as period poverty. Menstrual hygiene products are necessities, not luxuries, and period equity addresses this.

Several heavily-advertised products that are applied to the skin claim to relieve muscle or joint pain, but are not regulated by the FDA, and none of them offers any solid scientific evidence to back up their claims. So are they worth trying?

Resistance bands don't look impressive, but they work muscles in different ways than other pieces of strength-building equipment. The bands offer varying levels of resistance, can be used to strengthen a variety of muscle groups, and may be easier to use for some people.

Inflammation can be a beneficial sign that the body's immune system is fighting an infection, but it can also linger over time, damaging the body. There is evidence that eating a diet heavy in foods that promote inflammation can increase the risk for certain health problems, and also that a healthy diet can reduce inflammation.

Inflammatory bowel disease (IBD) is a treatable condition once considered a disease that largely affects people who are white, although in recent years it has been diagnosed more often in other racial and ethnic groups, in the US and around the world. Recognizing this condition early can make a difference in care and quality of life.

Millions of people around the world have sickle cell disease, a genetic condition that can cause pain and damage to organs or tissues, and can make children more susceptible to other health problems. In the US, most cases are diagnosed through screening in newborns. Getting connected to the proper care early in a child's life can help prevent complications from the disease.

Every day, more and more adults are getting vaccinated against COVID-19, helping us build toward herd immunity. But what about children and teens? What is the status of research on the vaccines in these groups, and when might vaccines be available for them?

After too much time spent indoors (and probably less active than is healthy), getting outside and taking a hike is a great way to get some exercise while enjoying nature. But before you hit the trail, make sure you're well prepared.

Although it has been known for some time that individuals with dementia frequently have poor, fragmented sleep, two new studies suggest that if you don't get enough sleep in midlife, you are at increased risk for dementia later in life.

A history of discrimination in multiple settings, including health care, may make some people who identify as LGBTQ+ hesitant to get a COVID-19 vaccine, even though the virus has disproportionately harmed this community. If you're struggling to make a decision, this may help you consider benefits and risks.

Polycystic ovary syndrome is the most common cause of infertility in women. In many cases, women with PCOS have skin and hair issues such as acne, hair loss, or excessive hair growth in places where they normally do not have hair. Treatment options vary depending on the symptoms and each woman's preferences.