Healing is a complicated process. As people age, higher rates of disease and the fact that old cells lose the ability to divide slow this process down.
Many people object to the added ingredients in vaccines. But pharmacists explain why those fears are unwarranted.
Any COVID-19 vaccine is likely to be given first to higher risk groups before it is given to children. But we still need vaccines that are safe and effective for them too.
A new study is the first to identify sex differences in inflammation and immune cell activation in response to SARS-CoV-2 infection, which causes COVID-19.
Older coronavirus patients face grimmer outlooks. A virologist explains the aging-related changes in how immune systems work that are to blame.
Several vaccines are in Phase 3 trials. So when will we know whether any of these will protect against COVID-19?
If antibody levels drop dramatically after an infection, what does that mean for immunity? An expert explains how B and T cells contribute to immunity and why antibodies don't tell the full story.
Immunosenescence — the decline of immune system function with age — means that vaccines are not as effective in older adults, the demographic most susceptible to many diseases, including COVID-19.
There is a low incidence of asthma in populations infected by parasitic worms. Now research has identified molecules secreted by these worms that could prevent or suppress asthma.
A rare new disease syndrome appears to be caused by an overactive immune response in children, often hitting weeks after exposure to the SARS-CoV-2 virus.
The disease is more severe in people with obesity, diabetes and hypertension — all conditions linked to changes in the gut microbiome.
'Normal' body temperature varies from person to person by age, time of day, where it's measured, and even menstrual cycle. External conditions also influence your thermometer reading.
It usually takes 10 years for a new vaccine to complete clinical trials, but we've been promised a COVID-19 vaccine in 12 to 18 months. Even if such fast-tracked development is possible, is it wise?
If you have had COVID-19 already, are you protected from another bout of the illness? And is the presence of antibodies in your blood a guarantee of immunity?
Why does COVID-19 hit men harder than women? Is the disparity in mortality rates due to male hormones or an underlying difference in the male versus female immune system?
Immunity to COVID-19 may be complicated. Here are the promises and pitfalls of antibody tests.
We blame the coronavirus for the thousands of deaths, but it is actually a hyperactive immune reaction that is the cause of death. An immunologist explains.
Vaccine development is usually a long process. The coronavirus pandemic is forcing researchers to innovate and test potential vaccines faster than ever before.
Over-active immune response might be behind higher rates of life-threatening COVID-19 infections in patients with obesity.
Cytokines ensure our immune system responds effectively to pathogens in our bodies. But in some cases, cytokines can cause the immune system to over-react.