No matter what technology becomes available, successful contact tracing comes down to common sense.

Tracking movements are being seen as a key element of mitigating the spread of Covid-19 under alert level 2.

Population health expert Daniel Exeter told Kate Hawkesby the onus is on everyone to make it worthwhile.

He says we need to rely on our memory to recount where and when we've been, so staying vigilant is key.

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