Industry

"Led by Imperial College London, analysis of finger-prick tests carried out at home between 20 June and 28 September found that the number of people testing positive dropped by 26.5% across the study period, from almost 6% to 4.4%."

As the continuous reduction of antibody level, people who got infected and recovered may be infected a gain.

Find out more information at the website of Imperial College London:

https://www.imperial.ac.uk/news/207333/coronavirus-antibody-prevalence-falling-england-react/