Australians have been warned their rapid antigen tests results for COVID-19 could be affected if they eat, drink, smoke, brush their teeth, or chew gum for 10 to 30 minutes before taking the test. The Therapeutic Goods Administration (TGA), the country’s medicines regulator, issued the updated notice on Feb. 2. “It is important that you do not eat, drink, smoke, brush your teeth or chew gum for 10-30 minutes (refer to the instructions provided) before collecting saliva for a rapid antigen test as it may produce an incorrect result,” the TGA said on Twitter. At-home rapid antigen tests have been hard to find amid the peak of COVID-19 cases caused by the Omicron variant of the novel coronavirus due to global shortages. The quick-result tests have formed part of back-to-school plans across Australia as well as safe work protocols for critically essential industries such as food and grocery, health, logistics, …