Vaccines are still seen as the best way to allow economies to reopen while keeping the public safe, but many poorer nations are still lagging far behind their richer counterparts -- tens of millions in Asian cities are now once again living in lockdown.
The surge in infections in Africa's most industrialised nation has overwhelmed hospitals and left overworked healthcare personnel struggling to find enough beds for critically ill patients.
Singapore has vaccinated almost half its 5.7 million population with at least one dose of the vaccines from Pfizer-BioNTech and Moderna. Both have shown efficacy rates of well over 90% against symptomatic disease in clinical trials, compared with Sinovac's 51%.
