Your immune system is a network of cells, tissues, and organs that fight off infection. Your immune system can be affected by ...

Herd immunity means that more people are immune to a contagious disease than the amount that can be infected. Here's how it ...

A Feb. 16 study in the Lancet medical journal found that, for people who had COVID-19 immunity resulting from infection, protection from severe disease and death remained high for at least 10 months.

In a recent study posted to the journal Nature, researchers showed that the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron infection without SARS-CoV-2 vaccination conferred ...

The novel coronavirus pandemic has brought "herd immunity" to the public consciousness, kindling hope the phenomenon can help slow or even end the outbreak.

Can certain infections, such as COVID, leave you more vulnerable to getting another illness? (Getty Images) Having a COVID-19 infection can shore up your immunity to the virus, but can it also leave ...

For at least 10 months after a COVID-19 infection, your immune system can provide good protection against symptomatic illness the next time around, a new study found, and the risk of severe illness is ...

When we’re exposed to a pathogen such as a virus, our immune system identifies it as a foreign invader and mounts an attack. This ultimately results in the formation of antibodies which can neutralise ...

A long first wave of COVID-19 in Brazil that killed over 150,000 people is subsiding, with public health experts attributing the drop at least in part to a large number of uncounted people who caught ...

Children’s immunity is frequently challenged by fluctuating weather and infections. Supplements are only good as a supplement ...