Covid-19 immunity from antibodies may last only months, UK study suggests (cnn.com)
(CNN)After people are infected with the novel coronavirus, their natural immunity to the virus could decline within months, a new pre-print paper suggests.
The paper, released on the medical server medrxiv.org on Saturday and not yet published in a peer-reviewed medical journal, suggests that antibody responses may start to decline 20 to 30 days after Covid-19 symptoms emerge. Antibodies are the proteins the body makes to fight infection.
"We show that IgM and IgA binding responses decline after 20-30 days," the researchers from institutions in the United Kingdom wrote in the paper, which also found that the severity of Covid-19 symptoms can determine the magnitude of the antibody response.
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