Coles panic buying supermarket coronavirus
(Image: AAP/James Ross)

This morning the head of the World Health Organisation (WHO) warned that countries relaxing their coronavirus restrictions too quickly could cause a surge in cases and a return to lockdown.

In Italy, modelling suggests that even a small “return to normal” with just a 20% increase in mobility could trigger a second wave which might claim more lives than the first. 

There are three factors that could cause a second wave of COVID-19 in Australia. Here's what they are.