A sign in County Kildare, Ireland. in March 2020. Epidemiologists around the world worked hard to try to stop big parties in the face of rising caseloads of what would come to be called COVID-19.
Niall Carson/PA Images via Getty Images
The US was not ready for the coronavirus pandemic in 2020. What can public health leaders and policymakers do to make sure we don't face another winter of rampant disease?
The Fairmont Royal York Hotel in Toronto. After the SARS pandemic in 2003, Toronto hotels faced a recovery period.
After SARS in 2003, an effort was made by Toronto's tourism and hospitality industries to stimulate the sector's recovery. But measures weren't put in place for future pandemics.
The COVID-19 new normal might be here for quite some time.
SolStock/E+ via Getty Images
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.
Is COVID-19 hitting men harder than women?
UpperCut Images/Getty Images
A new study is the first to identify sex differences in inflammation and immune cell activation in response to SARS-CoV-2 infection, which causes COVID-19.
A worker inspects vials of a SARS CoV-2 vaccine for COVID-19 produced by SinoVac at its factory in Beijing on Sept. 24, 2020.
(AP Photo/Ng Han Guan)
Our first exposure to a pathogen, either naturally or via vaccination, can affect how our immune system responds in the future to the same or similar pathogens.
The polymerase chain reaction, or PCR, is used to copy strands of DNA.
COVID-19 tests rely on a process developed at a biotech company co-founded by a Canadian. Canada’s current testing expertise needs to be channelled to prepare for the next wave, and the next pandemic.
Dan Peled/AAP Image
Australia's island identity and attitude to border security was forged from handling pandemics since the time of federation. Here's what we've learned along the way.
We are slowly figuring out which drugs and therapies are effective against the new coronavirus.
Anton Petrus / Getty Images
During the last six months, news reports have mentioned dozens of drugs that may be effective against the new coronavirus. Here we lay out the evidence and reveal which ones are proven to work. Or not.
A security guard checks the body temperature of a motorcyclist as a preventive measure.
Risa Krisadhi/SOPA Images/LightRocket via Getty Images
Detecting fever requires measuring core body temperature. Screening measures the body's surface temperature.
A few people in the crowd will be responsible for the bulk of a disease’s spread.
Pacific Press /LightRocket via Getty Images
Epidemiological data suggests that 80% of COVID-19 cases can be traced to just 20% of those infected with SARS-CoV-2.
The virus that caused the original Sars no longer haunts us, but the characteristics of today’s coronavirus mean it’s unlikely to disappear in the same way.
Moderna just released the results of a phase 1 trial for a COVID-19 vaccine.
JOSEPH PREZIOSO/AFP via Getty Images
Results from phase 1 trials of a COVID-19 mRNA vaccine created a burst of optimism. But details the company failed to release suggest it is too early to speculate whether the vaccine is effective.
A bottle of Covid Organics, a herbal tea that authorities in Madagascar gave to students.
Photo by Rijasolo/AFP via Getty Images
Authorities around the world can do more to ensure that correct information and messages on the pandemic reach everybody.
Brazilian scientist working on a vaccine at the Immunology laboratory of the Heart Institute (Incor) of the Faculty of Medicine of the University of Sao Paulo.
We don't have vaccines for the Sars, Mers or the common cold. But that doesn't mean scientists won't crack it this time.
A molecule responsible for lowering our blood pressure also helps coronavirus get into our cells and replicate. And it occurs more in men than in women.
The typically crowded Brooklyn Bridge in New York City, now nearly desolate in the midst of the coronavirus outbreak.
Getty Images / Victor J. Blue
Mysteries surround the coronavirus, but our expert is here to address some of the most perplexing issues.
Visitors look at new anti-SARS outfits for medical workers on display Thursday Nov. 6, 2003 in Shanghai, China, as the country braced for a resurgence. The disease never made a comeback.
AP Photo/Eugene Hoshiko
COVID-19 and SARS are both deadly – but different. SARS symptoms were quick to appear, making it easier to contain. Because health officials were able to contain it, the virus died off.
Plenty of warm and humid places – including Miami – are seeing the spread of SARS-CoV-2.
Jeff Greenberg/Universal Images Group via Getty Images
Winter is flu season – could it be coronavirus season as well? The research is mixed, but other factors besides temperature and humidity have more to do with the spread of SARS-CoV-2.
Ever heard of 229E, OC43, NL63 and HKU1?
SARS-CoV-2 virus particles, isolated from a patient and imaged using a transmission electron micrograph.
Two phrases you hear a lot these days are viral load and infectious dose. What do they mean? Do they reflect the severity of disease or whether someone will get severely ill? Two experts explain.