https://thenextweb.com/syndication/2020/05/10/small-errors-in-coronavirus-testing-might-lead-to-surprisingly-big-problems/

New antibody tests might be game-changers in keeping the public safe from infection while restarting the economy. Giving “immunity passports” to those who have tested positive for having had the disease would allow thousands of people to return to work.

However, there is as much controversy as there is excitement about this new idea. Foremost in many people’s minds are the ethical implications. People in difficult economic circumstances may, perversely, be incentivized to contract the disease so they can return to work. For others, privacy issues related to centralized storage of medical data is a stumbling block. The World Health Organization (WHO) has also cast doubt on the extent to which people who have recovered from COVID-19 will be protected from future infection.