Speed at which Changi Airport Covid-19 cluster grew is worrying, says expert, Singapore News & Top Stories – The Straits Times June 18, 2021 by CHERYL TAN 67%! … 19 out of the 28 infected airport workers were fully vaccinated. None of them needed oxygen support. Source: Speed at which Changi Airport Covid-19 cluster grew is worrying, says expert, Singapore News & Top Stories – The Straits Times