TOKYO: Japan's government said on Tuesday (Jun 2) it has approved saliva-based tests for COVID-19, offering a safer, simpler way to diagnose infection as well as boosting the number of tests being carried out using polymerase chain reaction (PCR) technology.

Currently, nasal swabs are the main source for PCR tests in Japan. Coughs and sneezes at the time of collecting samples can expose medical workers to the risk of potential infection, making it necessary for them to wear full protective gear when taking samples.