Outcomes in COVID-19 patients may be better in those recently infected with endemic coronaviruses. 

Fewer than 1 in 10 dialysis patients sampled had antibodies against the novel coronavirus as of July, indicating that the greater population is far from levels required to achieve herd immunity.

Adenovirus vectors deliver the genetic instructions for SARS-CoV-2 antigens directly into patients’ cells, provoking a robust immune response. But will pre-existing immunity from common colds take them down?

A study of Nicaraguan children links prior Zika virus infection with aggravated dengue fever symptoms.

An absence of germinal centers—which arise during infections to produce long-lived antibody-generating cells—might explain rapidly waning antibody levels in the disease.

White House officials hail convalescent plasma as a major breakthrough, but scientists say evidence supporting its effectiveness is still lacking.

Researchers say the popularity of convalescent plasma makes it more difficult to gather high-quality data on its efficacy.