In a game changer, US allows emergency use of new saliva-based Covid test. The US health watchdog has authorised the emergency use of a new and expensive saliva based laboratory diagnostic test for COVID-19 that could be a game changer in the diagnosis of the infection as it will enable rapid testing amongst more people easily. The Food and Drugs Administration Commissioner said that providing this type of flexibility for processing saliva samples to test for COVID-19 infection is groundbreaking in terms of efficiency and avoiding shortages of crucial test components like reagents.