As Greater Sydney's COVID outbreak continues to worsen, calls are growing for Australia to introduce rapid antigen testing in an effort to keep pace with the virus, and curb the spread of the highly infectious Delta variant. But what is rapid antigen testing and how does it work? - V Sydneyu se razmere v zadnjih dneh slabšajo zaradi najnovejšega izbruha Covida-19. Povečujejo se pobude, da bi Avstralija uvedla hitre antigenske teste za zelo nalezljivo različico Delta. Kaj so hitri antigenski testi in kako delujejo?