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Articles sur Immune response

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The older you get, the more slowly you heal, and there are a number of reasons why. Westend61 via Getty Images

Why do older people heal more slowly?

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.
Is COVID-19 hitting men harder than women? UpperCut Images/Getty Images

Why males may have a worse response to COVID-19

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.
An artist’s impression of antibodies (red and blue) responding to an infection with the new coronavirus SARS-CoV-2 (purple). KTSDESIGN/SCIENCE PHOTO LIBRARY / Getty Images

Declining antibodies and immunity to COVID-19 – why the worry?

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.
Vaccinologists have not focused their research on tailoring vaccines to induce robust immune responses in the elderly. (Shutterstock)

Why vaccines are less effective in the elderly, and what it means for COVID-19

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.
Doctors reported the first cases of MIS-C in April. Learning more about how SARS-CoV-2 affects children is essential to the safe reopening of communities. (Pexels/August de Richelieu)

Rare multisystem inflammatory syndrome in children linked to coronavirus

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 gut microbiome is the community of micro-organisms living inside the gastrointestinal tract, which performs many beneficial functions, including educating the immune system. (Shutterstock))

Gut reaction: How the gut microbiome may influence the severity of COVID-19

The disease is more severe in people with obesity, diabetes and hypertension — all conditions linked to changes in the gut microbiome.
For those who have suffered from COVID-19, do their antibodies guarantee immunity from subsequent disease? Sebastian Kaulitzki/Science Photo Library via Getty Images

Am I immune to COVID-19 if I have antibodies?

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?
It’s not yet clear whether antibodies in the blood of patients who have been infected with SARS-CoV-2 indicate immunity. Above: blood specimens for COVID-19 antibody tests. (AP Photo/Mary Altaffer)

Can antibody tests tell us who is immune to COVID-19?

Immunity to COVID-19 may be complicated. Here are the promises and pitfalls of antibody tests.

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