Miami-based news anchor Robin Simmons shared the story on social media too, writing: “This story on the #Deltastrain of #COVID-19 in Australia is sobering.

One man is responsible for transmitting the disease to at least 6 people … in one case just brushing past a man at a mall.”

Dr Feigl-Ding wrote that it is “safe to say” the Delta variant of Covid-19, which originated in India, is now “the greatest threat of the Covid-19 pandemic in 2021” and is “by far the fastest variant known to date”