SARS-CoV-2 RT-PCR testing and the importance of high sensitivity and high specificity testing.

Authorised public health officers need to rely on accurate scientific technology. Recently a SARS-CoV-2 cluster in Melbourne was traced to a seemingly innocuous engagement party. subsequently, 7 of the attendees are positive for SARS-CoV-2. At the time of the engagement party there were only 225 active cases in a city of 5 million. Some on social media have asserted that the probability that one attendee had SARS-COV-2 was 1 in 333.