Picture yourself at the gym. It might be confined, people are huffing and puffing, everyone is moving around. And that's before you hit the showers and change room.
Vaccinated people are well protected from getting sick, but could they inadvertently transmit the coronavirus?
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The COVID-19 vaccines are a smash success. But that doesn't mean they keep every vaccinated person completely free of the coronavirus.
You only have to prevent one case, which could have otherwise led to community spread and lockdown, for such a scheme to pay for itself many times over.
Sequencing the whole genome of patient virus samples lets scientists watch for new variants.
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By merging genomics with classical epidemiology, researchers are able to predict new disease outbreaks based on which viral variants are on the rise.
Our buildings and cities were not designed to handle a pandemic. But countries around the world are coming up with design ideas, some high-tech and some more basic, to reduce the infection risks.
Without improvements to New Zealand's 'makeshift' border quarantine system the risk of further community cases of COVID-19 variants remains high.
A person wears a protective face mask to help prevent the spread of COVID-19 as they walk past the emergency department of the Vancouver General Hospital on Nov. 18, 2020.
THE CANADIAN PRESS/Jonathan Hayward
Saving the economy requires minimizing, if not eliminating, community COVID-19 transmission.
Super-spreader events typically have the 'three Vs" in common: indoor venues, poor ventilation and vocalisation. But many buildings frequented by the public lack ventilation or the means to monitor it.
We still don't know how long the coronavirus lasts on surfaces in real-world conditions, such as on objects in the home, at work or in the supermarket.
From a purely environmental perspective, owning multiple reusable face masks, and machine-washing them together, is the best option.
Māori are historically at greater risk of severe illness and death during pandemics. New research shows they are at least 50% more likely to die from COVID-19 than other New Zealanders.
Most aged care homes are designed to be naturally ventilated. But when windows are closed to keep out the cold, poor ventilation appears to be common – and that's a problem for infection control.
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Latin America now has about 6 million COVID-19 cases – 30% of the global total. But some cities have fared much worse than others, largely due to the quality of government and community responses.
Getty Images/Marty Melville/AFP
We believe New Zealand can eliminate COVID-19 again. But it could do more to speed up that process with mandatory masks and tighter controls on high-risk venues, including bars, gyms and churches.
Border restrictions and quarantine have kept COVID-19 out of New Zealand, but new modelling shows contact tracing and quick isolation would control an outbreak, without the need for another lockdown.
You're right to be concerned but we can't draw too many conclusions from just one or two data points. Instead, we need to look at averages over multiple days.
People wearing face masks ride an attraction at the Playland amusement park at the Pacific National Exhibition, in Vancouver on July 10, 2020. While Canada has done a better job than other countries at managing COVID-19, its death rate still exceeds that of similar nations.
THE CANADIAN PRESS/Darryl Dyck
While Canada has done well compared to countries like the U.S. and the U.K. in containing COVID-19, rates of infection and deaths are higher than in many similar western democracies. Why?
In Irvine, Calif., a COVID-19 test is retrieved from a drive-in patient at Orange County Great Park. For four weeks, the testing station will see 520 patients per day.
Getty Images / Allen J. Schaben
There's more to the numbers than what you see on TV.
Victoria has recorded its largest single-day increase in COVID-19 cases. It might be time to return to a statewide lockdown.
Either the state government's measures will wrest back control of the outbreak, or unbridled community transmission could mean infection rates get totally out of control.