A new study has revealed that COVID-19 antibody levels fall in just a matter of weeks after a person is infected with the virus.
Scientists at Imperial College in London tracked antibody levels in 365,000 randomly selected adults to examine whether people could become immune to the virus after infection.
At the start of the pandemic there was hope that populations could develop herd immunity, meaning that large numbers of people would be immune to COVID-19 after being infected.
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