Some people's immune systems aren't able to stop foreign invaders, such as COVID-19, as well as the rest of the population. There are many reasons for this, including illness, medications and age.
University of Pittsburgh researchers are developing a vaccine patch for COVID-19 that is as easy to apply as a Band-Aid.
Different demographics are more or less vulnerable to serious complications from the coronavirus. A virologist explains the aging-related changes in how immune systems work that are to blame.
New research supports kidney transplants from HIV-positive donors to recipients with HIV.
An anthropologist works in American Samoa, taking advantage of the island's longstanding tattoo culture to tease out the effects tattoos have on the body's immune function.
With an ageing population, and the growing threat of antibiotic resistance, now is the time to be worried about sepsis.
Can your kids be too clean? Increases in allergies suggest so. But how much dirt is too much? A pediatric allergist explains the fascinating reasons the immune system needs dirt for training.
The 2018-2019 flu season was less deadly than the last. But the pattern of infection was unusual, thanks to the various strains circulating and the way flu shots work over time.
Scientific studies show that bats may carry "coronoviruses" causing SARS and MERS - without showing symptoms of disease. Could the bat immune system be key to human survival in future pandemics?
To get an effective vaccine for HIV/AIDS, scientists need to understand exactly how the virus works and immune system responds to it. African scientists have come one step closer.
A new evolutionary perspective on what's been a medical paradox: Why does the body use inflammation to regulate aspects of pregnancy when inflammation is also a big threat to pregnancy?
New genetic technologies are letting us look at flu evolution right where it starts: within individual people, while they're sick.
A few cancers vanish without any medical treatment. Researchers are studying these 'spontaneous regressions' to see if they can lead to new cancer treatments.
The immune system protects us from the constant onslaught of viruses, bacteria and other types of pathogens we encounter throughout life. But it can sometimes misbehave.