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New coronavirus variants could cause more reinfections, require updated vaccines

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Kai KupferschmidtScience’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.When the number of COVID-19 cases began to rise again in Manaus, Brazil, in December 2020, Nuno Faria was stunned.

The epidemiologist at the University of Oxford had just co-authored a paper in Science estimating that three-quarters of the city’s inhabitants had already been infected with SARS-CoV-2, the pandemic coronavirus—more than enough, it seemed, for herd immunity to develop.

The virus should be done with Manaus. Yet hospitals were filling up again. “It was hard to reconcile these two things,” Faria says.

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Southern Ontario highway partially closed due to convoy demonstrations: police - globalnews.ca - Usa - Canada - city Detroit - county Windsor
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Southern Ontario highway partially closed due to convoy demonstrations: police
convoy demonstrations against COVID-19 measures.Police said the westbound lanes of the highway at Nauvoo Road have been shut down due to “high traffic volumes” from “freedom convoy” demonstrators.Drivers in the area are being asked to follow emergency detour route signage. Windsor-Detroit Ambassador Bridge access resumes after trucker protest blocked traffic “The OPP respects the right of everyone to freedom of expression and peaceful assembly,” police said.“The OPP asks everyone to be patient and respectful of each other despite potential inconvenience.”The closure is approximately 45 km away from the Blue Water Bridge crossing between Canada and the United States in Sarnia, Ont.It’s not clear if that’s where convoy demonstrators are intending to go.Part of Highway 402 was blocked on Sunday as well due to convoy demonstrations. Police have redirected commercial traffic to the Bluewater Bridge in Sarnia, Ont., and urged motorists to avoid the area around the Ambassador Bridge in Windsor, Ont.There, a protest against COVID-19 measures is blocking Canada-bound vehicles from crossing the Ambassador Bridge between Windsor, Ont., and Detroit for a third day.More to come.— With files from The Canadian Press#LambtonOPP have implemented a closure of westbound Highway 402 at Nauvoo Road to ensure public safety.
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