The breast milk of mothers who received a COVID-19 vaccine contains antibodies that fight the illness and can protect babies, researchers say.

Convalescent plasma, once thought to be an effective way to treat people with mild to moderate COVID-19, doesn't really work, a new study shows.

"...delta is surging, yes, but there's no evidence that it is better at overcoming vaccine-induced immunity compared to other variants."

COVID-19 survivors appear to have wide-ranging immunity to the disease, researchers report. The finding may expand our understanding of human immune memory.

Children who had mild COVID-19 still have robust antibody responses up to four months later. In some case those responses are superior to that of adults.

A new rapid blood test could confirm if a person has received a COVID-19 vaccine while they wait to board a plane or enter a sporting event.

Researchers have found antibody-producing cells in people who had COVID-19 11 months after recovery. The work suggests the antibodies may last a lifetime.

"Antibodies are crucial to fend off infection, but some COVID-19 patients also develop antibodies that damage their own cells and tissues."

The way our immune system blankets the SARS-CoV-2 spike protein with antibodies could help design new vaccines to protect against emerging coronaviruses.

After somone has COVID-19, they may only need a single vaccine dose to produce a sufficient antibody response, say researchers.