![]() If there are 100 new cases a day, contact tracers must track down 1,000 to 2,000 contacts within 24 hours. "But in parallel, we also discovered the cracks in our contact tracing system."Ĭontact tracing is one of the most critical elements of infection control, according to epidemiologist and UNSW professor of global biosecurity Raina MacIntyre.Ī single positive case may have 10 to 20 contacts, she says. " had to have an incredibly long lockdown … because the virus was just constantly being re-seeded back into the community," Professor Bennett says. The catastrophic second wave erupted from the convergence of two fault lines: one from nature, the other man-made. "The question has to be asked: Did we work as well as we could have, as quickly as we could have … given the high cost to life and health?" "We did get to zero but … no-one would say 111 days of lockdown is a success story," Professor Bennett says. ![]() It seeded thousands of infections, killed hundreds and triggered one of the longest and toughest lockdowns in the world. ![]() The Rydges variant took a wildly different turn. ![]()
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