Canada may take into account scrapping the dear COVID-19 PCR take a look at for travellers


Because the U.S. reopens its land border, some specialists say the Canadian authorities ought to take into account scrapping its expensive COVID-19 PCR take a look at requirement for totally vaccinated travellers — notably for brief cross-border journeys.

As a substitute, they recommend Ottawa may have a look at utilizing the inexpensive, sooner and extra handy antigen assessments, that are used to display screen travellers within the U.S., however are additionally much less dependable.

“Would not it make extra sense to have [an antigen test] executed on the border quickly? You can get one executed in quarter-hour and even sooner … somewhat than a 72 hour-old [PCR] take a look at that is generally logistically tough [and] costly to get,” mentioned Amesh Adalja, an infectious illness doctor and a senior scholar on the Johns Hopkins Heart for Well being Safety in Baltimore.

“From the scientific standpoint, the antigen assessments make extra sense,” he mentioned, pointing to the very fact antigen assessments are executed a lot nearer to the time of the crossing. “So I believe that the U.S. coverage is definitely a greater one.”

At present, leisure travellers coming into Canada should present proof of a destructive molecular take a look at — akin to a PCR take a look at —taken inside 72 hours of their departing flight or deliberate arrival on the border. However these assessments will be costly, working as much as $300, and can take as much as 24 hours — or longer — for travellers to get their outcomes.

It is notably prohibitive for households, because the molecular assessments are required for everybody over the age of 5. Meaning for a household of 4, it could possibly add $1,000 to the price of a visit.

Molecular assessments extra delicate

Some nations, just like the U.S., solely require a fast antigen take a look at, which prices as little as $20 and supplies leads to as little as quarter-hour.

However antigen assessments aren’t as delicate as molecular PCR assessments (or polymerase chain response assessments), which means antigen assessments can miss low ranges of the virus.

“It results in a excessive false-negative as a result of your physique has to generate sufficient of the virus for it to point out us a optimistic consequence,” mentioned Warren Chan, a professor of biomedical engineering on the College of Toronto

WATCH | Journey prices rise as borders reopen to worldwide journey:

Journey prices rise as borders reopen to worldwide journey

As borders reopen to worldwide journey, Canadians planning journeys are being hit with sticker shock, with the excessive costs for necessary PCR assessments, the top of discounted airfare and rising rental automotive charges.

“In a PCR take a look at, the extent at which you’ll be able to detect is considerably a lot decrease. So in case you’ve been contaminated with a [low level] of the virus, PCR assessments would be capable to choose it up, however antigen assessments can not.”

 Dr. Fatima Kakkar, a Montreal-based pediatric infectious illness specialist, agreed that the PCR take a look at is the “gold customary” of testing for COVID-19.

If PCR assessments are a 100, she mentioned, an antigen take a look at can be about an 80 or 90, which means that they might be lacking as much as 20 per cent of individuals with COVID-19.

‘Cheap to ask the query’

Meaning it was actually cheap for Canada to require the PCR take a look at earlier than vaccines grew to become widespread, mentioned Kakkar.

“Now that we’re all vaccinated, the query is: Is it OK to take that threat?,” she mentioned of the calls to modify to antigen testing. “And I believe it is cheap to ask the query proper now.”

Canadian and American politicians representing border communities will maintain a information convention Monday to name on the federal authorities to raise the PCR testing requirement. 

On Friday, Chief Public Well being Officer Theresa Tam acknowledged that the PCR testing coverage was being “actively checked out.”

For the primary time in 20 months, the U.S. land border reopened Monday to Canadian travellers who’re totally vaccinated. (Elaine Thompson/The Related Press)

Dr. Zain Chagla, an infectious ailments doctor at St. Joseph’s Healthcare in Hamilton, mentioned he too believes the antigen take a look at ought to be thought-about.

“If we’re making an attempt to forestall individuals from coming into Canada with lively COVID-19, doing an antigen take a look at on the airport might be much more correct than a 72-hour-ago PCR take a look at, since you’re catching individuals which are infectious at that second as they enter Canada.”

In line with microbiologist and infectious illness doctor Dr. Marek Smieja, as lengthy as masks are worn along with vaccination, and ailing passengers are prevented from travelling, there ought to in all probability be solely a restricted function for testing.

‘Unnecessarily difficult’

“For totally vaccinated, both no testing in any respect or antigen testing earlier than journey can be applicable. PCR testing is pricey and acquiring testing has been unnecessarily difficult,” he mentioned in an e mail to CBC Information. 

“It both must be easier or cheaper, or eradicated altogether.”

Testing upon return to Canada ought to ideally proceed, he mentioned, however that ought to occur via self-collected PCR assessments — and people assessments ought to be freed from cost. The target can be to assist monitor which strains of COVID-19 are coming into the nation, mentioned Smieja, who can be the scientific director of McMaster HealthLabs in Hamilton.

At present, leisure travellers over the age of 5 who’re coming into Canada should present proof of a destructive PCR take a look at taken inside 72 hours of their departing flight or deliberate arrival. (Evan Mitsui/CBC)

The calls to rethink Canada’s PCR coverage for these returning to the nation have been notably loud in the case of quick journeys throughout the U.S. land border — which reopened Monday — with questions raised as to what protections these assessments will really present.

“I am unsure I perceive the rationale for testing travellers who’re going to the U.S. for a really quick journey,” Dr. Irfan Dhalla, co-chair of a federal advisory panel on COVID-19 testing and screening, instructed The Canadian Press.

“Even when we have been going to require assessments from these travellers, a take a look at taken in Canada, earlier than the journey even begins, wouldn’t be useful.”

Kakkar agreed that the federal government might need to re-examine their testing insurance policies relating to quick journeys as a result of they do not “make a lot logical sense.”

WATCH | PCR assessments not precious for day trippers to the U.S., professional says

PCR assessments not precious for day trippers to the U.S., professional says

Testing individuals returning to Canada from abroad for COVID-19 is sensible, in keeping with Dr. Christopher Labos, a heart specialist with a level in epidemiology. However testing individuals who drive to the U.S. for a day or two is much less efficient, because it would not catch any an infection they obtained whereas within the U.S.

The 72-hour coverage was designed for individuals happening trip or who can be overseas for an prolonged time period, and may doubtlessly get contaminated whereas overseas, mentioned Dr. Christopher Labos, a Montreal-based heart specialist with a level in epidemiology.

“It would not have the identical utility for any individual who’s day-tripping, who’s crossing the border and coming again both for journey or for work, due to the time it takes so that you can turn out to be symptomatic and to check optimistic for the virus,” he mentioned.

“In case you day-trip to the U.S. and are available again, getting examined within the U.S. will not be going to select up any an infection that you just acquired that very same day,” he mentioned. “I believe that is an apparent place the place that testing technique is not all that useful.”



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