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Canada to reopen borders to nonessential travel- first to Americans

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7/8:
Canada's back to requiring a negative PCR test for all returning Canadians, regardless of trip length:
https://www.thestar.com/politics/federal/2021/12/17/canada-lifts-african-travel-bans-restores-covid-19-pre-arrival-tests-for-short-trips.html

zzcarp:

--- Quote from: 7/8 on December 17, 2021, 01:11:40 PM ---Canada's back to requiring a negative PCR test for all returning Canadians, regardless of trip length:
https://www.thestar.com/politics/federal/2021/12/17/canada-lifts-african-travel-bans-restores-covid-19-pre-arrival-tests-for-short-trips.html

--- End quote ---

Once again the knees are jerking.

froggie:
^ The shorter incubation period for the Omicron variant is a likely reason why.  There are documented cases of people catching (and testing positive for) the Omicron variant just a  day or two after testing negative.

kalvado:

--- Quote from: froggie on December 18, 2021, 11:44:00 AM ---^ The shorter incubation period for the Omicron variant is a likely reason why.  There are documented cases of people catching (and testing positive for) the Omicron variant just a  day or two after testing negative.

--- End quote ---
Frankly speaking, since PCR is pretty much a "yes or no" test, any version would go from "yes" to "no" in a day,  if a daily test taker would get infected.
My assumption is that "within 72 hours" is mostly to weed out asymptomatic cases. Those were seen as pretty common originally; by now that estimate is much lower

Duke87:
Don't try to make too much scientific sense of it. Public policy decisions like this are invariably driven primarily by a political need to "do something".

Any health-related border restrictions between the US and Canada are about as helpful as taking a swimming pool that someone has pissed in both ends of and putting a partition down the middle to try and stop the piss from spreading.

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