Канада бледно выглядит. С сегодняшними темпами 70% получат две дозы где-то к сентябрю, но варианты и малый срок иммунитета помешают наступлению herd immunity. Статья о США, там вакцинация идет лучше чем в Канаде, но пока только 25% получили обе дозы и случаи растут: https://www.usatoday.com/story/news/hea ... 139419002/
with about a quarter of Americans saying they might not want to be immunized, herd immunity is simply not an attainable goal.
“It's theoretically possible but we as a society have rejected that," said Dr. Gregory Poland, director of the Mayo Clinic's Vaccine Research Group. “There is no eradication at this point, it’s off the table. The only thing we can talk about is control.”
After initially aiming for the kind of protection provided by the measles vaccine, officials are now focused on containment similar to the flu: acknowledging there will be regular outbreaks but hoping to limit them as much as possible.
... Last summer, the World Health Organization put the combined infection and vaccination thresholds needed to break the chain of transmission at 60% to 70%. By December, Fauci put the number for the U.S. at 75% to 85%. With the appearance of highly transmissible variants, some have bumped it to 90%.
The unwillingness of some Americans to get vaccinated, however, likely has put the number out of reach.