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Artículos sobre Immune response

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A sign shows the way to a recovery area to monitor any immediate side effects from the COVID-19 vaccine on Dec. 17, 2020, in Reno, Nevada. Patrick T. Fallon /AFP via Getty Images

What COVID-19 vaccine side effects might I expect?

Many people never experience the least bit of discomfort from the COVID-19 vaccines, but mild side effects are common. They include swelling in the affected arm, nausea and chills.
Make that second appointment and get your final dose for full protection. MediaNews Group/Reading Eagle via Getty Images

How effective is the first shot of the Pfizer or Moderna vaccine?

An immunologist explains that you get some protection from the first dose of the mRNA vaccines but you need two to build up strong immunity, particularly to newer coronavirus variants.
Gene-based vaccines had never been approved for humans before the coronavirus pandemic. Juan Gaertner/Science Photo Library via Getty Images

3 medical innovations fueled by COVID-19 that will outlast the pandemic

The coronavirus pandemic has driven a lot of scientific progress in the past year. But just as some of the social changes are likely here to stay, so are some medical innovations.
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.

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