Singapore has witnessed a 23 percent week-on-week increase in Covid-19 community infections, with the rise largely driven by an increased spread of the newer Omicron subvariants BA.4 and BA.5. On the Straits Times’ The Big Story, Assistant video editor Olivia Quay spoke to Professor Dale Fisher, Yong Loo Lin Singapore of Medicine NUS, to find out more and what we should take note of.