COVID19 5 May 2020 Government's scientific advisers warn of black market for fake antibody test results Sign UpGet the New Statesman's Morning Call email. Sign-up Using antibody tests to decide whether people can return to work could lead some people to deliberately catch coronavirus or buy fake test results, the group of scientists advising the government has warned. A sub-group of the Scientific Advisory Group for Emergencies (Sage) last month warned of the "negative behavioural responses" that could result from widespread use of antibody tests, documents released today show. Employers might discriminate against staff based on an antibody test results, the scientists warned. If a positive test was required to return to work, people might "game" the system by deliberately becoming infected or by buying a fake test result from the black market, they said. The government needed to proactively introduce measures to stop that from happening, they added. › Why the UK's lockdown rules are too vague and risky Subscribe For more great writing from our award-winning journalists subscribe for just £1 per month!