The central Australian town of Alice Springs has entered a 72-hour lockdown as of 1 p.m. local time on June 30 after a mine worker who spent seven hours at the airport infected four family members with the Delta variant of the CCP virus. The mine worker, who contracted the virus while in Brisbane hotel quarantine, left Newmont’s Granites Mine on Friday, June 25, and spent several hours at the Alice Springs airport, NT Chief Minister Michael Gunner told reporters on June 30. Despite an initial negative COVID-19 test result on June 26, he has since developed symptoms while isolating in Adelaide, and four out of five of his household contacts have tested positive. For this reason, Gunner and health experts believe he is positive for COVID-19 and highly infectious. However, they don’t believe he was highly infectious while at Alice Springs airport. “Like all our other decisions, we will not take …