Fig. 2From: Challenges in the control of COVID-19 outbreaks caused by the delta variant during periods of low humidity: an observational study in Sydney, AustraliaReported cases of COVID-19 caused by the B.1.617.2 (delta) variant of SARS-CoV-2, Sydney, Australia 16 June to 10 September 2021 (primary axis) and 9:00 am temperature (°C) and 9:00 am relative humidity (%) (secondary axes)Back to article page