If you've tested positive for COVID-19, a public health officer will call you to interview you. It can be confronting – but it's important to answer the contact tracer's questions as best you can.
There’s valuable data on the spread of COVID-19 in this wastewater.
Montgomery County Planning Commission
As the world waits for vaccines against COVID-19, testing wastewater can give communities and smaller locales, such as school districts, valuable signals about infections trends.
What will happens when students return home for Christmas?
If nothing is done to reduce university-based Covid-19 infections, each infected student is likely to infect one other person in their household during the winter holidays.
People wear face masks to help control the spread of COVID-19 as they walk along a street in Montréal on Oct. 18, 2020.
THE CANADIAN PRESS/Graham Hughes
The Great Barrington Declaration's advocacy for naturally acquired herd immunity to COVID-19 amounts to a global chickenpox party: naive and dangerous.
The COVID-19 new normal might be here for quite some time.
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As ready as you are to be done with COVID-19, it's not going anywhere soon. A historian of disease describes how once a pathogen emerges, it's usually here to stay.
Even if some places reach herd immunity, the virus is unlikely to disappear.
The focus, for some time, has been on new daily case numbers. But what if we are looking at the wrong figure? We should focus on the average number of cases "under investigation" over the last 14 days.
We're likely to see clusters of cases pop up and outbreaks that are hard to stamp out. But we can't stay in lockdown forever. We have other options.
Areas with the highest levels of mortality in the first wave do not show a significant resurgence of cases this time around. But why?
An unprecedented level of research has gone into understanding the novel coronavirus. Here's what we still don't know.
A yellow fever ward in Havana in 1899.
Will the COVID-19 pandemic change the global balance of power? It wouldn't be the first time.
AAP Image/Dave Hunt
A preliminary study published online this week estimates Australia had 60,000 undiagnosed COVID-19 infections by July. But there are a range of limitations to the study.
The pandemic has exposed many of us to new statistical concepts, on the news, in everyday conversations and on social media. But how many are you getting wrong?
Friaaz Azeez gets tested for COVID-19 by a health-care worker at a pop-up testing centre at the Islamic Institute of Toronto in Scarborough, Ont., on May 29, 2020.
THE CANADIAN PRESS/Nathan Denette
Understanding terms like sensitivity and specificity can help us make sense of COVID-19 testing, the accuracy of tests and what the results mean.
Overall, Victoria’s roadmap is good. It identifies the right goal, provides explicit criteria for when restrictions might be lifted, and involves mostly appropriate restrictions.
Genetic analysis of virus samples from New Zealand's latest COVID-19 cases is now much swifter. It's providing key information, but hasn't yet answered the question of where this second wave started.
A night manager at one of Melbourne's quarantine hotels has been designated as "patient zero" in Victoria's second wave of COVID-19. Here's what that actually means.
On Aug. 11, Russian President Vladimir Putin announced that a coronavirus vaccine developed in the country has been registered for use.
Russian Health Ministry/Handout/Anadolu Agency via Getty Images
As Russia fast tracks a coronavirus vaccine, scientists worry about skipped safety checks – and the potential fallout for trust in vaccines if something ends up going wrong.
Health care workers use a nasal swab to test a person for COVID-19 in Pembroke Park, Florida.
Joe Raedle/Getty Images News via Getty Images
A recent report by the CDC estimated that the true number of COVID-19 cases in the US could be six to 24 times more than the number of confirmed cases. A public health scholar explains the implications.
Random testing conducted in Indiana gives public health officials some of the most representative and accurate data to date.
AP Photo/Darron Cummings
A team of researchers from Indiana University performed random testing for SARS-CoV-2 across the state. The results offer some of the most accurate data to date about important aspects of the virus.