Canada’s border closures might have stemmed COVID-19 variant imports
Dynamic restrictions on nonessential overseas journey into Canada helped gradual COVID-19 variant introductions in early 2020 and 2021, permitting the federal government extra time to scale up vaccination, testing, and phone tracing packages, in keeping with a research printed yesterday in eLife.
A group led by College of British Columbia researchers genetically sequenced SARS-CoV-2 samples within the first and second pandemic waves to estimate variants’ geographic origins. They recognized 2,263 introductions of SARS-CoV-2 variants into Canada, together with 680 that went on to flow into inside the nation and 1,582 that did not seem to flow into.
Within the first wave, 49% of the sublineages originated in the US and had been launched primarily into Quebec (39%) and Ontario (36%). Whereas the US was nonetheless the predominant supply of variants within the second wave (43%), India and the UK made up 16% and seven% of introductions, respectively.
After Canada closed its borders to overseas journey on Apr 22, 2020, viral importations, which had peaked at 58.5 sublineages every week, fell 3.4-fold inside 2 weeks and 10.3-fold inside 4 weeks. New variants, nevertheless, continued to be launched at a low charge till the second wave started in August 2020, probably fueled by important overseas staff supporting the provision chain.
In October 2020, after journey restrictions had been eased barely, SARS-CoV-2 introductions elevated, and by the tip of February 2021, an estimated 30 B.1.1.7 sublineages had been launched.
Senior creator Jeffrey Pleasure, PhD, of the College of British Columbia, mentioned in an eLife information launch that broad and long-term restrictions towards nonessential worldwide journey aren’t essentially advisable in gentle of their financial impacts.
“Nonetheless, our evaluation means that swift and stringent journey bans in the direction of localities harbouring a excessive frequency of a brand new variant of concern, or an outbreak of a wholly new virus, not but recognized domestically, needs to be critically thought-about to scale back the chance of seeding a number of, simultaneous outbreaks and overwhelming healthcare programs,” he mentioned.
Aug 2 eLife study and news release
Rhode Island stories Jamestown Canyon virus case
The Rhode Island Division of Well being (RIDH) has reported a Jamestown Canyon virus case, which seems to be the primary US case of the yr. In an announcement, it mentioned the affected person is a resident in his or her 50s who lives in Washington County within the southwest.
The person had neurologic signs and is now recovering.
Jamestown Canyon virus is transmitted by mosquitoes, principally between deer and mosquitoes, however it will possibly additionally infect folks. Sicknesses can vary from asymptomatic or delicate to extreme, leading to meningitis or encephalitis.
Final yr, Rhode Island reported its first Jamestown Virus case since 2013. In response to the Facilities for Illness Management and Prevention (CDC), infections usually happen from April via September. Whereas the virus has been discovered all through a lot of the United States, most infections have been reported in Minnesota and Wisconsin. The nation averages about 16 instances of the neuroinvasive type of the illness annually.
Aug 1 RIDH press release
CDC background on Jamestown Canyon virus
Dec 8, 2021, CIDRAP News scan on earlier case
H5N1 avian flu infects extra US wild birds, Russian poultry
The US Division of Agriculture (USDA) Animal and Plant Well being Inspection Service (APHIS) reported 114 extra extremely pathogenic H5N1 avian flu detections in wild birds, bringing the whole for the reason that center of January to 2,004.
Many of the detections had been from jap states, together with Florida, Maine, Massachusetts, New York, and Pennsylvania. A number of seabirds had been among the many birds discovered useless with the virus from Maine and Massachusetts. Florida once more reported a number of detections in black vultures.
Within the west, Alaska, California, Oregon, Utah, and Washington reported detections in a wide range of birds, together with waterfowl, raptors, and some ravens.
Sporadic detections and outbreaks in poultry have continued over the summer time, each in the US and Europe.
In associated information, Russia reported H5N1 in poultry for the primary time in Magadan oblast within the jap a part of the nation, in keeping with a notification from the World Group for Animal Well being (WOAH). Most of Russia’s earlier H5N1 outbreaks in poultry have occurred within the west. The most recent outbreak started on Jul 22 and killed 6,443 of seven,775 chickens at a industrial farm.
USDA APHIS replace on avian flu in wild birds
Aug 2 WOAH report on H5N1 in Russia