Immune Responses

Nursing home residents who receive a bivalent COVID-19 mRNA vaccine show signs of substantial immune system response to omicron variants.

Patients who had rebound symptoms after taking Paxlovid showed a more robust immune response to SARS-CoV-2 than patients with no rebound, investigators reported.

Despite the threat of the quickly spreading and highly mutated omicron coronavirus variant — which has just landed in the U.S. — we are safer than we were before the pandemic, some experts say.

The World Health Organization’s new guidance for using the REGEN-COV monoclonal antibody cocktail to treat COVID-19 covers a narrower group of patients than those included in the FDA’s updated...

The finding may explain why some people — and notably older adults — suffer more severe COVID-19 illness than others. The discovery has implications for treatment timing and vaccination, investigators...

Frail and elderly adults were systematically excluded from COVID vaccine trials. But now there are enough original studies involving long-term care residents to begin understanding how COVID vaccination...

Blood samples from recovered COVID-19 patients show that they and their vaccinated peers should be able to fend off the virus and its variants in future encounters, NIH researchers say.

Seniors are more likely to contract COVID-19 again — with only 47% protection against repeat infection, compared with 80% for younger people, according to a new, large-scale study from Denmark.

The experimental vaccine was safe and well-tolerated among all 560 trial participants, including adults aged 70 and older, the company said Thursday.

The experimental vaccine also reduced the risk of adverse events in older study participants, the drugmaker reports.