渥太华儿童、青少年疫苗接种率在安省领先,迄今未发生严重不良反应

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Ottawa children, youth lead province in vaccination rates, with no serious adverse reactions so far​

“Yes, there is a risk associated with vaccination. It is an extremely low risk. And our opinion is this very low risk is very much outweighed by the risk of getting COVID-19.”

Author of the article: Elizabeth Payne
Publishing date: Jul 10, 2021 • 20 hours ago • 4 minute read • 11 Comments
CHEO


CHEO PHOTO BY JEAN LEVAC /Postmedia News

Ottawa children and youth have been lining up in record numbers to get vaccinated against COVID-19 and pediatric health officials have been watching closely.

Ottawa leads the province when it comes to COVID-19 vaccination rates among 12- to 17-year-olds: 78 per cent have had at least one dose compared with 58 per cent Ontario-wide. And numbers are growing rapidly.

So far the rollout to kids and youth has gone smoothly.

There have been no serious heart complications related to vaccination among children under 17, CHEO cardiologist Dr. Jane Lougheed says. She and others have been answering questions from parents on a daily basis about the benefits of vaccinations versus potential risks to ensure vaccine confidence remains high.

“We do it as part of our job. All health-care providers are getting lots of questions from parents,” says Dr. Anne Pham-Huy, a pediatric infectious disease specialist at CHEO.

CHEO is among those pediatric centres with special clinics devoted to monitoring adverse events after vaccination. It existed before the pandemic, but part of its focus now is on COVID-19 vaccines as more children are vaccinated. It is part of a special immunization clinic network across Canada whose aim is to ensure vaccine safety and vaccine confidence.

“People are hearing a lot about adverse events, but this is not a new thing in our world,” Pham-Huy says. “In terms of vaccinology, there is always a continuous monitoring of safety. This is just another tool.”

Among potential rare side effects that have been linked to mRNA vaccines are cardiac complications.

Lougheed says she is frequently asked about risk of myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the heart lining). The rare adverse event has been linked to mRNA vaccines and is more common in young men. Lougheed says the parents of children she treats with serious cardiac issues have been among those with concerns.

She says children with complex heart issues are at no greater risk of the extremely rare side effect and may be at greater risk of complications from infection — she advises parents to make sure their children are vaccinated.

“Yes, there is a risk associated with vaccination. It is an extremely low risk,” Lougheed says. “And our opinion is this very low risk is very much outweighed by the risk of getting COVID-19.”

Based on data from Israel and the United States, the risk of developing myocarditis or pericarditis after vaccination is about one in 5,000 to one in 10,000, she said. It is more common in males between ages 16 and 19. Many of the cases reported among adults in Ottawa and elsewhere are relatively mild and resolve in a number of days.

“The bottom line is that the risk of a cardiac complication is extremely low.”

Lougheed says CHEO has “not seen a large number of kids to date with any of the cardiac complications or issues related to mRNA vaccines”. No children have been hospitalized with heart complications related to immunization.

Still, Lougheed says she understands that some families are worried.

In addition to reassuring families, Lougheed and others encourage them to bring their children to CHEO if they have any symptoms such as chest pain or shortness of breath after being vaccinated.

And, while children often have milder cases of COVID-19 when they do get infected, she notes that children can end up with serious complications. About one per cent of children who get COVID-19 end up in hospital, she says, and about one-third of those children will end up in intensive care.

Children can also suffer from multi-system inflammatory syndrome after infection, which can be serious. There have been a handful of such cases among children who had to be hospitalized at CHEO during the pandemic. All have recovered.

“Vaccine confidence is really essential in the management of this pandemic.” Pham-Huy says. “It is always concerning to hear of any rare or potential adverse events after vaccine, but we have to remember there are very severe adverse events with infection.”

Research released by Statistics Canada this past week found that more children than older adults had previous COVID-19 infections leading up to the third wave of the pandemic in Ontario, as many as one-third of them asymptomatic. The research supports other evidence that COVID-19 circulates among children and that children are infected at higher rates than positive test results indicate.

Most people who get myocarditis or pericarditis after immunization have mild symptoms and don’t require hospitalizations, Lougheed says.

Most children and teens over 12 have not yet received second doses, but will soon begin to do so. Nor have children under 12 been approved for COVID-19 vaccination. That is expected in late fall.

Lougheed says the high numbers of teens lining up for vaccines are an indication that they are motivated by wanting to return to more normal lives.

“The teens are realizing that they want to get back to some sense of normalcy. There is a lot of motivation on their part.”

 

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第一针一般没事,关键是这第二针,要不要减剂量?
 

ottawa_tj

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CHEO有一批青少年较早打了第一针,因为他们有些existing condition, 时间上应该已经该打第二针了,看看结果吧……

最近没有美国的数据,他们那里应该有更多的案例。

辉瑞对12-17岁减量的可能性基本为零……
 

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1626110438943.png


渥太华12以上完全疫苗免疫率已达54%,忽略最下一行数据,大概是没有及时更新,不可能低于上两行数据。
 

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渥太华12以上完全疫苗免疫率已达54%,忽略最下一行数据,大概是没有及时更新,不可能低于上两行数据。

大概13000名12-17岁的青少年打了两针,觉得不会有那么多。。。

按美国的比例,大概会有一例心肌炎。。。
 

笃悠悠

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大概13000名12-17岁的青少年打了两针,觉得不会有那么多。。。

按美国的比例,大概会有一例心肌炎。。。
这里的13000 应该是男女娃的总数。所以26000 打了第二针,有可能出现一例。
 

longshan

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渥太华12以上完全疫苗免疫率已达54%,忽略最下一行数据,大概是没有及时更新,不可能低于上两行数据。
最下面一行数据没有问题
说的是total population包括0-11岁
 

ottawa_tj

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这里的13000 应该是男女娃的总数。所以26000 打了第二针,有可能出现一例。

我的数学不好,没看明白这26000的来历?
 

笃悠悠

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我的数学不好,没看明白这26000的来历?
你说的13000 个娃接受第二针Pfizer,可能会出现一例心肌炎。这个比例接近CDC 估算的12-17岁男娃组的数据,女孩的risk rate 要小得多(差5-6倍)。简单估算,26000 个娃里有13000 男娃吧。
 

ottawa_tj

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你说的13000 个娃接受第二针Pfizer,可能会出现一例心肌炎。这个比例接近CDC 估算的12-17岁男娃组的数据,女孩的risk rate 要小得多(差5-6倍)。简单估算,26000 个娃里有13000 男娃吧。

哦,CDC的数据每百万dose2,男女混合37例心肌炎。女娃:男娃,9:67。
 
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