Some people who have previously been infected with COVID-19 and later received a vaccine may develop a powerful immunity to the virus and variants of it that emerge, recent research suggests. These ...

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 ...

A T-cell response, or cellular immunity, was present in 100 people six months after their initial COVID-19 infection, according to a study published in the preprint server BioRxiv. Researchers from ...

Research links COVID vaccination to higher acute kidney injury risk within one year, though vaccinated people showed lower ...

Remember when we thought Covid was a two-week illness? So does Michael Peluso, assistant professor of medicine at the University of California, San Francisco. He recalls the rush to study acute Covid ...

A new study led by University of Toronto researchers has shown that immune cells in the gut follow an atypical pathway to ...

Patients with mild cases of coronavirus disease 2019 (COVID-19) had cellular immunity after 6 months; political support among caregivers of patients with COVID-19 was spotlighted; 2 lots of type 2 ...

A new study has found that people previously infected with the novel coronavirus disease (COVID-19) who get vaccinated reach peak immunity faster than those who have never been infected. This suggests ...

For many people, COVID was not a short illness that faded with time. Months later, they still report fatigue, brain fog, ...

A new clinical trial explored whether raising cellular NAD⁺ levels with high-dose nicotinamide riboside could influence lingering neurological and physical symptoms in long-COVID. Millions of people ...

On December 18, a San Diego emergency room nurse was given a shot of the COVID-19 vaccine. A week later, he tested positive for the virus, CNN affiliate KGTV reported. Stories like this will become ...

Get it early, develop immunity, get back to work: some wonder As COVID-19 numbers climb precipitously, health care workers, first responders and the countless individuals working in "essential ...