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Articles on Immune system

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Cancer and organ transplant patients, people with untreated HIV and people with other immunodeficiencies are at high risk of severe COVID-19 infection. burakkarademir/E+ via Getty Images

Immunocompromised people make up nearly half of COVID-19 breakthrough hospitalizations – an extra vaccine dose may help

People with weakened immune systems are at a high risk of severe and prolonged COVID-19 infections. An extra vaccine dose can bolster protection.
Vaccination has saved millions of lives throughout the course of history. Phynart Studio/E+ from Getty Images

Millions are rejecting one of humanity’s best weapons for saving lives: Vaccines

Vaccines have successfully curtailed viral diseases for decades. But as COVID-19 vaccination hesitancy shows, mistrust and misinformation continue to put lives at risk.
World Day for Physical Activity is April 6. Since the COVID-19 pandemic began, many peoples’ physical exercise routines have been disrupted. (Shutterstock)

A year into the pandemic, COVID-19 exercise slump has hit women harder

Research shows that the gaps in physical exercise have widened substantially between men and women, whites and non-whites, rich and poor and educated and less educated: especially during the pandemic.
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.
Children’s early interactions with their environment are essential for the immune systems to learn to differentiate between safe versus dangerous disease-causing microbes. (CDC/Cade Martin)

A year of COVID-19 lockdown is putting kids at risk of allergies, asthma and autoimmune diseases

COVID-19 prevention measures are at odds with guidelines for healthy development of children’s immune systems. The result may be a cluster of youth with more allergies, asthma and autoimmune disease.

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