Coronavirus: What's happening in Canada and around the world on Dec. 10
U.K. reports boosters protect against omicron, as South Korea cases surpass record

The latest:
- Toronto Raptors game attendees warned of possible COVID-19 exposure.
- COVID-19 infections are on the rise and omicron could supercharge daily case counts, federal modelling says.
- Alberta reports 287 new COVID-19 cases, 1 more death.
- Ontarians 18 or older will be eligible for vaccine booster shots as of Jan. 4.
- Minister Marci Ien self-isolating after potential COVID-19 exposure at gala.
- 'I stopped eating': Rise in eating disorders seen among Ontario youth during pandemic.
- Northern states are becoming American COVID-19 hotspots as winter weather returns.
- Have a coronavirus question or news tip for CBC News? Email: COVID@cbc.ca.
Booster shots of the COVID-19 vaccine give an estimated 70 to 75 per cent protection against mild disease from the omicron variant, the U.K. Health Security Agency (UKHSA) said on Friday, citing initial findings from a real-world study.
The findings are some of the earliest data on the protection against omicron outside of lab studies, which have shown reduced neutralizing activity against the omicron variant.
In an analysis of 581 people with confirmed omicron, two doses of AstraZeneca or Pfizer-BioNTech vaccines provided much lower levels of protection against symptomatic infection compared with what they provide against delta.
However, when boosted with a dose of Pfizer vaccine, there was around 70 per cent protection against symptomatic infection for people who initially received AstraZeneca, and around 75 per cent protection for those who received Pfizer.
That compares with estimated protection against infection from delta following a booster of around 90 per cent.
"These early estimates should be treated with caution but they indicate that a few months after the second jab, there is a greater risk of catching the omicron variant compared to delta strain," said Dr. Mary Ramsay, head of immunization at the UKHSA.

Meanwhile, in South Korea, the interval for coronavirus booster vaccines for all adults was shortened to three months, down from four or five, officials said on Friday, as the country struggles to fight record levels of infections.
New coronavirus infections in South Korea have exceeded 7,000 for the third consecutive day in a record-breaking surge that has crushed hospitals and threatens the country's goals to weather the pandemic without lockdowns.
Prime Minister Kim Boo-kyum said the country could be forced to take extraordinary measures if the virus doesn't slow soon. Officials issued administrative orders requiring hospitals around the country to designate 2,000 more beds combined for COVID-19 treatment.
In the United States, individual states called on the National Guard and other military personnel to assist virus-weary medical staff at hospitals and other care centres.
People who became sick after refusing to get vaccinated are overwhelming hospitals in certain states, especially in the Northeast and the Upper Midwest.
New York on Friday announced a statewide indoor mask order, effective Monday and lasting five weeks through the holiday season.
In Michigan, health director Elizabeth Hertel warned: "I want to be absolutely clear: You are risking serious illness, hospitalization and even death," without a vaccination.
The seven-day rolling average for daily new cases in the U.S. rose over the past two weeks to 117,677 by Thursday, compared to 84,756 on Nov. 25, Thanksgiving Day. The number of people hospitalized with COVID-19 has soared to about 54,000 on average, according to the Centers for Disease Control and Prevention.
"We're entering a time of uncertainty, and we could either plateau here or our cases could get out of control," New York Gov. Kathy Hochul warned.
-From Reuters and The Associated Press, last updated at 8:00 p.m. ET
What's happening across Canada
Federal public health officials on Friday reported that COVID-19 activity is increasing — and cautioned that more severe cases could be seen if trends continue.
Over the past week, there was an average of:
- More than 3,300 new cases of COVID-19 reported daily.
- More than 1,460 people with COVID-19 in hospital each day, including more than 450 people in intensive care units.
- 20 deaths reported daily.
- A total of 29,896 deaths nationally since the beginning of the pandemic and 1,764,159 recoveries.
"As we head into the winter months with a strained health system in many areas of the country, a high degree of caution is needed to minimize spread and impact — particularly during the upcoming holiday season," Dr. Theresa Tam, Canada's chief public health officer, said at a modelling briefing on Friday.
-From CBC News, last updated at 2:30 p.m. ET
- Travellers from South Africa report prolonged stays in quarantine hotels — at taxpayers' expense.
- Quebec reports 2,013 new cases of COVID-19 on Friday, 6 additional deaths.
- Ontario reports 1,453 new COVID cases, as province announces it will open up booster shots for those 18 or older starting in January.
- N.S. opens appointments for COVID-19 booster shots for ages 60 and over.
- In scathing report, auditor general says feds failed to protect foreign farm workers from the pandemic.
- N.L. averaged 1,400 fewer surgeries per month from onset of pandemic through June, study finds.
- N.S. surgery backlog may take 2 years to clear