Free flu shot programs have been extended in NSW, Queensland and Western Australia as hospitals continue to be inundated with people falling ill.
With more than 65,000 confirmed cases in May - more than double the month's previous record - Australia is in the grip of a heavy rebound influenza season following light caseloads during COVID-19 lockdowns.
NSW Health Minister Brad Hazzard wants more parents to take up the offer of free jabs, which will now run until July 17, for children during school holidays.