Covid-19 immunity from antibodies may last only months, UK study suggests
(WorldNews Europe)

(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, 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. Why a positive Covid-19 antibody test...