The beginning of Vancouver Island’s fourth wave is here
Every new case on the Island has for weeks been the faster-spreading Delta variant. Here's what that means
By Brishti Basu
August 5, 2021
A rapid rise in COVID-19 cases in BC through the month of July and into August has experts concerned about the coming phase of the pandemic, with the Delta variant making up every new case on Vancouver Island for the past few weeks.
Dr. Sarah Otto, a professor of evolutionary biology at the University of British Columbia, along with an interdisciplinary team of independent experts known as the
BC COVID-19 Modelling Group, released their seventh report on the state of the pandemic in late July.
It found that while vaccination rates are on the rise, the province has already entered a period of rapid growth in COVID-19 cases propelled by a corresponding surge in Delta variant cases.
“We are at the beginning of a fourth wave,” Otto told Capital Daily, pointing out a graph created by their modelling group colleague, data analyst Dr. Jens von Bergmann, which shows a steady rise in cases in every health authority after most restrictions were lifted in BC on July 1.
The steepest ongoing incline in case counts has been in the Interior Health region—a departure from the last three waves of the pandemic, where Fraser Health accounted for the majority of cases. A total of 742 new cases were recorded over BC Day long weekend, between July 30 and Aug. 2.
Nearly 400 of the cases were in the Interior Health region. Several communities in that region hold the dubious honour of having some of the lowest vaccination rates in the province. Overall, as of July 23, 26.2% of the population in Interior Health remained unvaccinated, compared to 14.8% in Vancouver Coastal, the region that boasts the highest vaccination rates in the province thus far.
The central Okanagan local health area was identified as the main hotspot for virus transmission and, as a result, a local outbreak was declared in that region. While the rest of BC goes maskless, central Okanagan residents are required to wear masks in all public indoor spaces and people from outside the area are discouraged from travelling there until at least Aug. 11.
Otto praises these regional restrictions as “an excellent approach ...to address the rise in cases where they are quickly, rather than wait for many more cases across the province.”
Delta spreading among vaccinated
More precautions are still needed in communities with a high vaccination rate, primarily because of the Delta variant, which spreads more easily than others and can be transmitted by vaccinated people.
The Delta variant spreads among vaccinated individuals, most of whom are asymptomatic and don’t know they’re infected, until it finds an unvaccinated host. From there, the virus has an easier time spreading to others who have not been immunized and has a much higher likelihood of landing them in the hospital.
A look at the vaccination status of people hospitalized with COVID-19 in BC proves this point. According to BC Ministry of Health statistics, between June 15 and July 15, 137 unvaccinated people landed in the hospital—just eight fully vaccinated individuals were hospitalized in that period.
The Delta variant has been hard at work in July, rapidly overtaking the Alpha and Gamma variants that were once prevalent in BC. At last count, Delta accounted for 61% of cases in the province, followed by Gamma which made up 28% of sequenced cases.
More:
https://www.capitaldaily.ca/news/the-beginning-of-vancouver-islands-fourth-wave-is-here