Skip to main content
The Globe and Mail
Support Quality Journalism.
The Globe and Mail
First Access to Latest
Investment News
Collection of curated
e-books and guides
Inform your decisions via
Globe Investor Tools
per week
for first 24 weeks

Enjoy unlimited digital access
Enjoy Unlimited Digital Access
Get full access to
Just $1.99 per week for the first 24 weeks
Just $1.99 per week for the first 24 weeks
var select={root:".js-sub-pencil",control:".js-sub-pencil-control",open:"o-sub-pencil--open",closed:"o-sub-pencil--closed"},dom={},allowExpand=!0;function pencilInit(o){var e=arguments.length>1&&void 0!==arguments[1]&&arguments[1];select.root=o,dom.root=document.querySelector(select.root),dom.root&&(dom.control=document.querySelector(select.control),dom.control.addEventListener("click",onToggleClicked),setPanelState(e),window.addEventListener("scroll",onWindowScroll),dom.root.removeAttribute("hidden"))}function isPanelOpen(){return dom.root.classList.contains(}function setPanelState(o){dom.root.classList[o?"add":"remove"](,dom.root.classList[o?"remove":"add"](select.closed),dom.control.setAttribute("aria-expanded",o)}function onToggleClicked(){var l=!isPanelOpen();setPanelState(l)}function onWindowScroll(){window.requestAnimationFrame(function() {var l=isPanelOpen(),n=0===(document.body.scrollTop||document.documentElement.scrollTop);n||l||!allowExpand?n&&l&&(allowExpand=!0,setPanelState(!1)):(allowExpand=!1,setPanelState(!0))});}pencilInit(".js-sub-pencil",!1); // via darwin-bg var slideIndex = 0; carousel(); function carousel() { var i; var x = document.getElementsByClassName("subs_valueprop"); for (i = 0; i < x.length; i++) { x[i].style.display = "none"; } slideIndex++; if (slideIndex> x.length) { slideIndex = 1; } x[slideIndex - 1].style.display = "block"; setTimeout(carousel, 2500); } //

Montreal epidemiologist Kate Zinszer, seen here on May 6, 2020 with her children Charlie (6 years old, left) and Livia (4 years old) and their dog Pino in St-Lambert, Quebec, is aiming to start collecting samples of saliva or blood, drawn through finger-pricks, from 3,000 to 4,000 Quebec children as soon as next month.

Christinne Muschi/The Globe and Mail

Every parent in Canada wants to know how likely children are to spread the novel coronavirus, but Montreal epidemiologist Kate Zinszer needs an answer more than most.

Her husband has cancer and is undergoing chemotherapy, which makes him vulnerable to the virus. Her six-year-old son, meanwhile, has apraxia, a neurological motor disorder that affects his speech, which makes him vulnerable to falling behind without formal schooling.

“It’s honestly a tough choice,” Dr. Zinszer said of keeping her son, Charlie, out of kindergarten to protect his father. “Is this a critical period of time where he should be in school and he’s not going to be in school? It’s a worry.”

Story continues below advertisement

As Quebec children outside of Montreal head back to their classrooms on Monday, Dr. Zinszer, a professor in the department of social and preventive medicine at the University of Montreal, is preparing to lead a study that she hopes will shed light on the role that children play in the transmission of SARS-CoV-2, the virus that causes COVID-19.

Although details are still being ironed out, Dr. Zinszer and her colleagues at the University of Montreal, Laval University, the Montreal Public Health Department and the National Public Health Institute of Quebec are aiming to start collecting samples of saliva or blood, drawn through finger-pricks, from 3,000 to 4,000 Quebec children as soon as next month.

The rate at which young children spread the coronavirus remains one of the big unanswered questions of the pandemic.

There is little doubt children are capable of transmitting the virus, but plenty of doubt about how often they actually do.

Figuring that out is taking on more urgency as several European countries tentatively reopen their schools and as Montreal – the hardest-hit city in Canada – looks to welcome children back on May 25.

“The bottom line is, in the observations made up until now, it seems that kids are not an important factor in community spread,” said Jesse Papenburg, a pediatric infectious-disease specialist and medical microbiologist at the Montreal Children’s Hospital. “That’s not to say they don’t spread it. They do. But it just seems to be at a much lower frequency than older kids and adults.”

If that holds true as more evidence pours in, then this coronavirus would be substantially different from influenza and other respiratory viruses, which pass easily among runny-nosed children and on to the adults who cherish their grimy hugs and sloppy kisses.

Story continues below advertisement

In one well-publicized case, a nine-year-old British boy living in France was infected with the coronavirus as part of an outbreak at a ski chalet in the French Alps in late January.

Despite attending three different ski schools while mildly ill, the boy seemed to have passed the virus to just one of 73 close contacts who underwent testing, according to a study published in the journal Clinical Infectious Diseases. Even his siblings escaped infection.

In the Australian state of New South Wales, preliminary data on students and staff in 15 primary and high schools found only two cases in which the virus was thought to have been passed on at school, even though researchers at the country’s National Centre for Immunization Research and Surveillance identified initial cases in nine students and nine teachers.

What is the reopening plan in my province? A guide

Coronavirus guide: Updates and essential resources about the COVID-19 pandemic

How many coronavirus cases are there in Canada, by province, and worldwide? The latest maps and charts

“This is consistent with the overall low rate of disease seen in children worldwide and evidence of limited child to child and child to adult spread,” the New South Wales researchers said in an e-mail to The Globe and Mail.

Children also seem less likely to kick off chains of transmission at home, according to an analysis by Chinese and Australian researchers published March 30 on the preprint server MedRxiv. The study, which has not been peer reviewed, found that children were the index, or first, cases in only three of 31 household clusters of COVID-19 in five countries.

In Switzerland, the health ministry’s infectious-diseases chief, Daniel Koch, told a news conference in late April that it was safe for children under the age of 10 to briefly hug their grandparents because young children, who generally have mild symptoms, are unlikely to catch or spread the virus.

Story continues below advertisement

But the country’s National COVID-19 Science Task Force disagreed, publishing a policy brief that found the evidence on children and transmission was “insufficiently robust” to draw conclusions.

The Swiss task force is hardly alone. Germany’s top virologist warned against a wholesale reopening of schools after publishing a study that concluded children infected with the coronavirus had as much of the virus in their noses and throats as adults, which suggests they’re just as infectious.

Other critics say some early studies raise more questions than they answer. Did the nine-year-old boy in the French case spread SARS-CoV-2 to so few because he was co-infected with influenza and another virus? Was the early data from Australia’s schools skewed by the fact that, halfway through the data-gathering period, the premier of New South Wales encouraged parents to keep their children home from school?

“There are limitations that really, I think, prevent drawing conclusions [from the Australian data] to say that there’s no transmission in school or that it’s exceedingly low,” said Stephen Freedman, a pediatric emergency medicine doctor at Alberta Children’s Hospital in Calgary who is leading an international study on how COVID-19 affects children.

The simple reality, other studies point out, is that even if children are less likely than adults to spread the coronavirus – perhaps because their mild symptoms mean they cough and sneeze less – the sheer number of contacts they’ll have when schools reopen could make classrooms a hotbed of infection, particularly if physical distancing isn’t enforced.

To take one example, a new study in the Canadian Medical Association Journal found that school closings, along with other public-health measures such as cancelling mass gatherings, were consistently associated with reduced growth of COVID-19 epidemics.

Story continues below advertisement

Much like Dr. Zinszer and her colleagues in Montreal, researchers at Toronto’s Hospital for Sick Children and St. Michael’s Hospital are trying to get a better handle on the role children play in transmission. They have asked a subset of parents from a long-running study called TARGet Kids to swab themselves and their children weekly for coronavirus testing.

Catherine Birken, a pediatrician at SickKids and co-leader of TARGet Kids, said they’re also asking participants to fill out regular surveys about how they’re coping with school closings and physical distancing, which pose their own risks.

“We are very interested in the infectivity,” Dr. Birken said, “but it feels like a really large impact on children will be from the isolation.”

Globe health columnist André Picard examines the complex issues around reopening schools and businesses after the coronavirus lockdown. He says whatever happens as provinces reopen, there's also a second wave of COVID-19 illnesses looming in the fall. André was talking via Instagram Live with The Globe's Madeleine White.

Sign up for the Coronavirus Update newsletter to read the day’s essential coronavirus news, features and explainers written by Globe reporters.

Coronavirus information
Coronavirus information
The Zero Canada Project provides resources to help you manage your health, your finances and your family life as Canada reopens.
Visit the hub

Your Globe

Build your personal news feed

  1. Follow topics and authors relevant to your reading interests.
  2. Check your Following feed daily, and never miss an article. Access your Following feed from your account menu at the top right corner of every page.

Follow the author of this article:

Follow topics related to this article:

View more suggestions in Following Read more about following topics and authors
Report an error Editorial code of conduct
Due to technical reasons, we have temporarily removed commenting from our articles. We hope to have this fixed soon. Thank you for your patience. If you are looking to give feedback on our new site, please send it along to If you want to write a letter to the editor, please forward to

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff. Non-subscribers can read and sort comments but will not be able to engage with them in any way. Click here to subscribe.

If you would like to write a letter to the editor, please forward it to Readers can also interact with The Globe on Facebook and Twitter .

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff. Non-subscribers can read and sort comments but will not be able to engage with them in any way. Click here to subscribe.

If you would like to write a letter to the editor, please forward it to Readers can also interact with The Globe on Facebook and Twitter .

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff.

We aim to create a safe and valuable space for discussion and debate. That means:

  • Treat others as you wish to be treated
  • Criticize ideas, not people
  • Stay on topic
  • Avoid the use of toxic and offensive language
  • Flag bad behaviour

If you do not see your comment posted immediately, it is being reviewed by the moderation team and may appear shortly, generally within an hour.

We aim to have all comments reviewed in a timely manner.

Comments that violate our community guidelines will not be posted.

Read our community guidelines here

Discussion loading ...

To view this site properly, enable cookies in your browser. Read our privacy policy to learn more.
How to enable cookies