Why can the human immune system often remember a vaccination for a whole lifetime? Researchers at ...

A nearly COVID-free summer has long been the goal of public health officials who are striving to get enough people vaccinated by then to achieve so-called herd immunity. But is that a realistic goal? ...

Your immune system may be weak if you have frequent, severe, or extended infections. Learn more signs of a weak immune system.

When food is scarce, stress hormones direct the immune system to operate in "low power" mode to preserve immune function ...

A healthier gut could start with one letter. Some medical experts recommend using the "5R approach" to help restore the gut’s biodome, which may improve mood, reduce inflammation and alleviate some ...

The circumstances surrounding a study on a deadly virus could hardly have been more dramatic. One of its first authors was forced to flee his homeland when it became a war zone. More than 2,000 ...

With an ongoing measles outbreak across the United States, some questions about the best protective measures have emerged. Health and Human Services Secretary Robert F. Kennedy Jr. has joined other ...

A medical expert explains whether people who have already recovered from COVID-19 should still get vaccinated. Learn how natural immunity, booster protection, and timing after infection affect your ...

No magic elixir can prevent children from developing occasional colds and viruses, but takings steps to boost their immune system can minimize their chances of catching every bug that winds its way ...

Sara Moniuszko is a health and lifestyle reporter at CBSNews.com. Previously, she wrote for USA Today, where she was selected to help launch the newspaper's wellness vertical. She now covers breaking ...

Immunity passports would threaten our privacy and information security, and would be a significant step toward a system of national digital identification that could be used to collect and store our ...