The Dose

Catherine Hankins, the co-chair of Canada’s COVID-19 Immunity Task Force, explains why achieving herd immunity may be elusive, but stopping transmission with vaccines can lead to a similar return to some semblance of normalcy — and that should be the focus.

Surveys suggest cannabis use in Canada is up by as much as 35% in the pandemic. And cannabis sales doubled in this country last year. So what are the risks of cannabis use? And how can you minimize those risks? Neuroscientist Sarah Konefal, a research and policy analyst with Canadian Centre on Substance Use and Addiction, has the lowdown on the reducing the harms of getting high.

The risk of catching coronavirus outdoors is very low. Yet new pandemic restrictions in Ontario ban most outdoor sports and gatherings. Infectious diseases physician Dr. Sumon Chakrabarti joins Dr. Brian Goldman to debunk myths about outdoor transmission - and explain why being outside is so much safer than being inside, and what you can do to reduce your risk even further.

The COVID variant P1 is surging in BC and spreading east. Infectious diseases and critical care specialist Dr. Srinivas Murthy joins Dr. Brian Goldman to break down what you need to know about P1 - and what can be done to stop it, including restricting interprovincial travel.

Learning how to breathe better can have real impacts on your overall health, according to James Nestor, author of “Breath: The New Science of a Lost Art”. He shares tips on how we can harness the power of our breath, even when we're wearing a mask, and feel better physically and mentally as a result.

This week we hand The Dose over to you. Canadians have been on a roller-coaster with changing guidance on the AstraZeneca-Oxford vaccine, so we put your questions to infectious disease specialist Dr. Zain Chagla who, despite rising COVID-19 numbers and vaccine concerns, remains optimistic.

There's lot of confusing information around the COVID-19 vaccines. It's hard to figure out what's accurate and what's misinformation or deliberate disinformation. Infectious diseases expert Tara Moriarty joins host Dr. Brian Goldman to talk tips and hacks for spotting COVID vaccine misinformation.

The third wave of COVID is here in Ontario according to experts but epidemiologist Raywat Deonandan says there are steps governments and individuals can take to blunt its impact in Ontario -- or avoid the wave altogether in other regions of the country -- including closing schools.

Losing weight is frustratingly hard -- especially during a pandemic when studies show people have gained weight. Host Dr. Brian Goldman is joined by one of Canada’s leading experts on weight loss, Dr. Sean Wharton, who breaks down the best science around how to lose weight, as well as the connections between COVID-19 and obesity.

With kids in Canada mostly back in classrooms, more kids are testing positive for COVID-19. So how do you know if your kid has COVID? Infectious disease physician Dr. Janine McCready breaks down the symptoms, the best tests for kids, and how to lower the risk of your kid getting sick.

The pandemic is testing the limits of kids' resilience. But there are proven strategies that can help children cope, even if caregivers and parents feel they’re not coping so well themselves. Nancy Heath, a professor of educational and counselling psychology at McGill University in Montreal breaks down what parents should - and shouldn't - be doing to foster resilience.

With the COVID-19 variants spreading in Canada, infectious disease specialist Dr. Lynora Saxinger joins Dr. Brian Goldman to break down the newest science around masks, with tips on which ones you should be wearing, how to fit them, and how to tell if your mask is working.

Infectious disease specialist Dr. Zain Chagla breaks down everything you need to know about the five leading vaccines against COVID-19 and how they work - or don’t - against the variants of concern. And what it could all mean for your life and the future of the pandemic.

Stress changes your brain and has physical, mental and cognitive side effects. Many Canadians report drastically increased stress rates during the pandemic. Psychology professor Leslie Roos joins Dr. Brian Goldman to share proven, evidence based strategies for managing stress and feeling better.

Doctors say walking is one of the most meaningful things you can do to improve your health because it delivers a powerful range of physiological, cognitive and mental health benefits. So much so that Dr. Jane Thornton actually prescribes walking to her patients.

Infectious disease specialist and virologist Dr. Samira Mubareka says the presence of seemingly more infectious coronavirus variants in Canada is a public health emergency and existing public health rules around social distancing, masks, and hygiene may have to be tightened.

As kids' screen time soars during pandemic, experts say there could be serious long term physical, mental and emotional consequences - but treating tech like nutrition can help parents: consume healthy tech, limit junk tech, and eliminate the toxic.

Considering taking some time off from alcohol? Addictions specialist Dr. Peter Selby says booze breaks like "Dry January" are a good idea, especially in light of a new study showing Canadians are binge-drinking during the pandemic.

The largest immunization rollout in Canadian history has begun with the arrival of the first doses of a COVID-19 vaccine. This milestone raises many questions, from why different people get the first shots in different provinces to concerns about potential allergic reactions or adverse side effects when our turn finally comes. Plus, there's already a lot of misinformation out there. Dr. Caroline Q...

The longer we live with COVID-19, the more clear its toll on our mental health becomes. Now we're dealing with yet another emotional challenge: a holiday season unlike any other, when most Canadians are being asked to hunker down within our own households to prevent the spread of the virus. Plus, it's winter, when many people feel down even in "normal" times. There's hope for sure -- a COVID-19 va...

The stress of COVID-19 has left a lot of people lying awake at night. Before the pandemic, insomnia already affected a significant proportion of Canadians. Now the number of people suffering from lack of sleep has skyrocketed. But Célyne Bastien, a psychology professor specializing in insomnia at Laval University and president of the Canadian Sleep Society, says there are things we can do to help...

Across Canada there is a patchwork of inconsistent conclusions on whether or not schools are contributing to the exponential spread of COVID-19, leaving many parents and teachers confused. Amy Greer, Canada Research Chair in Population Disease Modelling, joins The Dose host Dr. Brian Goldman to provide some clear, science-based answers.

There are now two COVID-19 vaccine candidates that look very promising. Late-stage clinical trials suggest they may be more than 90 per cent effective. The Canadian government has signed deals with both manufacturers, so if they’re approved by Health Canada, experts say they should be available to us sometime next year. But a new vaccine naturally raises lots of questions, from its safety profile...

COVID-19 cases continue to rise across Canada -- and so does the sense of urgency felt by health-care providers and public health officials. It’s become clear to many that at this point, the only way to stop the virus from choking the health-care system is to bring in tough restrictions to reduce contact between people. Physicians in Alberta recommend a short, sharp lockdown -- known as a “circuit...

Throughout the pandemic, Ontario and Quebec have consistently had the highest number of infections in the country. But now, Canada’s unexpected COVID-19 hotspot is Manitoba. After seeming to successfully keep the virus at bay during the first wave, things have taken a disastrous turn for the worse. Health-care workers have called on the Manitoba government to take urgent action, saying the pandemi...