Sydney’s July Crossroads Hotel and December Avalon and patient transport worker outbreaks have been compared by covid19data.com.au, which makes for an interesting comparison.
The charts (embedded below) track the first coronavirus cases in July associated with and following the Crossroads cluster and the first December Avalon case (and subsequent outbreaks, such as the Croydon and BWS Berala clusters) against each other. In July, there were 155 cases on day 18 of that outbreak compared to 188 on day 18 now. When Sydney last had 155 active cases, it took more than three months (greater than 100 days) to get back to consecutive days of zero local cases being reported.
The graphs refer to December and July because NSW Chief Health Officer Dr Kerry Chant said on Sunday that there were presently two concurrent outbreaks affecting Sydney since December – the cluster connected to infected overseas travellers and a patient transport driver who became infected (connected to the BWS Berala cluster), and the Avalon cluster, which has no identified “patient zero” to date and whose source may remain a mystery. The strain of COVID-19 at the heart of the Avalon cluster has, however, been identified as being from the United States.
