South Australian Premier Steven Marshall has called for patience as the rollout of COVID-19 rapid antigen tests begins across the state. The government has lifted a ban on the widespread use of the tests, clearing the way for their sale in pharmacies and supermarkets. Until now they have only been used in certain sectors, including health care and the mining industry. “We planned for the use of rapid antigen testing to be implemented when we reached a level of COVID within the community and we have now hit that mark,” Marshall said. “Rapid antigen testing is a useful tool for surveillance testing and asymptomatic South Australians who are looking for a greater sense of confidence before socially interacting with others.” The premier said South Australian stores would take time to transport the stock to their shelves and urged people to remain patient over the coming days if they were not …