PCR, RAT – these are two acronyms not known to the general public a year ago. But now, they’ve become part of daily conversation. 

But do we know which one is best? And when one should be used over another? 

To help us figure this out is the Head of Paediatrics at The University of Western Australia’s School of Medicine and Head of the Vaccine Trials Group at the Telethon Kids Institute, Professor Peter Richmond.