The UKHSA-backed study is the world’s biggest study into COVID- 19 antibodies and regularly tests a large cohort of healthcare workers to answer the most important questions about the virus. The latest paper focuses on the protection provided against COVID- 19 infection in those who have had 2 doses of the vaccine, as well as those who have previously been infected with COVID-19. The results show that 2 doses of vaccine provide significant short-term protection against infection among those who had not had a previous infection – but that this protection wanes significantly after 6 months. Anal…