Reuters Health News Summary Australia to extend COVID-19 lockdown in Victoria amid Delta outbreak Australian authorities on Monday said Victoria state will extend a COVID-19 lockdown beyond Tuesday despite a slight drop in new infections as the country's two biggest cities fight to stop the spread of the highly infectious Delta variant. Victoria state Premier Daniel Andrews said lockdown rules would not be lifted as cases were still being detected in the community, promising more details would be provided on Tuesday. S.Korea military suffers worst COVID-19 outbreak aboard anti-piracy ship off Africa South Korea's military has recorded in biggest cluster of COVID-19 infections to date, with more than 80% of personnel aboard a destroyer on anti-piracy patrol in the Gulf of Aden testing positive. While the 247 cases are not directly linked to new domestic infections, with the destroyer having left South Korea to start its mission in February, the surge comes as the country battles its worst-ever outbreak of COVID-19 cases at home, with another 1,252 new infections reported for Sunday.