Immune but infectious: Can someone vaccinated against COVID-19 still spread the virus? - Global News | Canada News Media
Connect with us

Business

Immune but infectious: Can someone vaccinated against COVID-19 still spread the virus? – Global News

Published

 on


As the cross-Canada roll-out of COVID-19 vaccines continues this week, it’s still unclear whether the injections can actually prevent the spread of the virus.

While both the Pfizer-BioNTech and Moderna products have been shown to be about 95 per cent effective at preventing symptomatic COVID-19 illness, there is not much evidence they can protect those around the person who got the shots.

“Yes, you are still contagious,” Dr. Hana El Sahly told Global News.

El Sahly was one of the lead investigators for Moderna’s late-stage COVID-19 vaccine trial. She says the novel coronavirus can live in the nasal passage for weeks, meaning a vaccinated person could still infect others, even if they don’t get sick. But there was one promising result in the study.

“We did find, in the short term, that those who got the vaccine were less likely to carry [the virus], but the numbers were really small,” El Sahly said.

Story continues below advertisement

Read more:
Advocates call for targeted approach to address COVID-19 vaccine hesitancy in Canada

Both the Moderna and the Pfizer vaccines require people to get two doses, about a month apart, to be effective.

Twenty-nine days after their first dose of Moderna, 14 study participants were found to be carrying the virus — versus the 38 people who received a placebo.

“It’s a signal in the right direction, but nonetheless it cannot be interpreted that the vaccine prevents transmission.”






2:02
Alberta’s COVID-19 vaccine rollout rate and the plan to ramp it up


Alberta’s COVID-19 vaccine rollout rate and the plan to ramp it up

Dr. Jason Kindrachuk, Canada Research Chair in Emerging Viruses, explains the mRNA-based vaccine teaches our immune system to fight the virus, but it doesn’t block it from entering our body.

“People may be able to still get infected even though they’re vaccinated, but it’s a sub-clinical infection — so they don’t feel sick, they don’t have any symptoms, but they may still be able to transmit,” said Kindrachuk.

Story continues below advertisement

Read more:
How long will the COVID-19 vaccine protect you? Here’s what we know so far

Ongoing research will determine if any COVID vaccine can actually prevent transmission. That will require “collecting a lot of nose swabs on a lot of people,” according to El Sahly.

While asymptomatic carriers are less likely to spread the virus than someone who is coughing and sneezing, masks, distancing and hand-washing will still be critical in 2021 until most Canadians can be vaccinated.

“As we build up that immunity in the public, there is lower and lower… ability for the virus to be able to leap from one person to another,” Kindrachuk said.

Some experts suggest at least 70 to 75 per cent of a population will have to be immunized to control the spread of the virus.

That said, the percentage of the Canadian population that needs to be vaccinated in order to reach confidently herd immunity is unknown, according to Canada’s chief public health officer Dr. Theresa Tam.

“We have an assumption that you will probably need 60 to 70 per cent of people to be vaccinated. But we don’t know that for sure … that’s modelling,” Tam told a media conference on December 4.






2:18
How Canada’s COVID-19 vaccine rollout plan is unfolding


How Canada’s COVID-19 vaccine rollout plan is unfolding – Dec 14, 2020

Still, the vaccines are providing some comfort for stressed health-care workers. Pediatric emergency physician Samina Ali received her first dose of the Pfizer vaccine on Jan. 2.

Story continues below advertisement

“It was just so much overwhelming relief… it felt like… as a community, as a world, this was a sign that we were on the way to healing,” Dr. Ali said.

Read more:
Alberta’s COVID-19 vaccine rollout rate and the plan to ramp it up

How Pfizer’s and Moderna’s mRNA-based COVID-19 vaccines work

A vaccine is generally made up of a weakened or a dead virus, which, once injected, prompts the body to fight off the invader and build immunity.

Both Pfizer and Moderna’s candidates have been manufactured using mRNA-based technology, a relatively new way to make vaccines.

Instead of injecting a deactivated form of the virus, the mRNA vaccine uses a component of the virus DNA called messenger RNA that basically contains the genetic instructions for the human body to make the specific spike protein of the coronavirus.

By doing this, the immune system learns to recognize and respond to that specific protein, meaning it can more quickly mount a response if the virus enters the body. The mRNA, however, does not modify a person’s DNA or genetic makeup.

“When your body actually sees the real virus, then you have the weapons already in place — the antibodies and the cells that know this virus that can recognize it — and can kill it faster,” Dr. Donald Vinh, an infectious disease specialist and a medical microbiologist at the McGill University Health Centertold Global News.

Story continues below advertisement

Read more:
AHS ‘actively recruiting’ more staff to help with COVID-19 immunization

According to the data from the clinical trials, Pfizer’s vaccine, which is 95 per cent effective, can offer partial protection as early as 12 days after the first dose.

That protection can last for at least two months, according to Vinh. A second dose is then required to achieve the vaccine’s full potential.

The Moderna vaccine, which also requires a second shot, has shown to be 94 per cent effective.






3:07
Health Canada approves Moderna’s COVID-19 vaccine


Health Canada approves Moderna’s COVID-19 vaccine – Dec 23, 2020

— With files from Saba Aziz, Global News

© 2021 Global News, a division of Corus Entertainment Inc.

Let’s block ads! (Why?)



Source link

Continue Reading

Business

Japan’s SoftBank returns to profit after gains at Vision Fund and other investments

Published

 on

 

TOKYO (AP) — Japanese technology group SoftBank swung back to profitability in the July-September quarter, boosted by positive results in its Vision Fund investments.

Tokyo-based SoftBank Group Corp. reported Tuesday a fiscal second quarter profit of nearly 1.18 trillion yen ($7.7 billion), compared with a 931 billion yen loss in the year-earlier period.

Quarterly sales edged up about 6% to nearly 1.77 trillion yen ($11.5 billion).

SoftBank credited income from royalties and licensing related to its holdings in Arm, a computer chip-designing company, whose business spans smartphones, data centers, networking equipment, automotive, consumer electronic devices, and AI applications.

The results were also helped by the absence of losses related to SoftBank’s investment in office-space sharing venture WeWork, which hit the previous fiscal year.

WeWork, which filed for Chapter 11 bankruptcy protection in 2023, emerged from Chapter 11 in June.

SoftBank has benefitted in recent months from rising share prices in some investment, such as U.S.-based e-commerce company Coupang, Chinese mobility provider DiDi Global and Bytedance, the Chinese developer of TikTok.

SoftBank’s financial results tend to swing wildly, partly because of its sprawling investment portfolio that includes search engine Yahoo, Chinese retailer Alibaba, and artificial intelligence company Nvidia.

SoftBank makes investments in a variety of companies that it groups together in a series of Vision Funds.

The company’s founder, Masayoshi Son, is a pioneer in technology investment in Japan. SoftBank Group does not give earnings forecasts.

___

Yuri Kageyama is on X:

The Canadian Press. All rights reserved.

Source link

Continue Reading

Business

Trump campaign promises unlikely to harm entrepreneurship: Shopify CFO

Published

 on

 

Shopify Inc. executives brushed off concerns that incoming U.S. President Donald Trump will be a major detriment to many of the company’s merchants.

“There’s nothing in what we’ve heard from Trump, nor would there have been anything from (Democratic candidate) Kamala (Harris), which we think impacts the overall state of new business formation and entrepreneurship,” Shopify’s chief financial officer Jeff Hoffmeister told analysts on a call Tuesday.

“We still feel really good about all the merchants out there, all the entrepreneurs that want to start new businesses and that’s obviously not going to change with the administration.”

Hoffmeister’s comments come a week after Trump, a Republican businessman, trounced Harris in an election that will soon return him to the Oval Office.

On the campaign trail, he threatened to impose tariffs of 60 per cent on imports from China and roughly 10 per cent to 20 per cent on goods from all other countries.

If the president-elect makes good on the promise, many worry the cost of operating will soar for companies, including customers of Shopify, which sells e-commerce software to small businesses but also brands as big as Kylie Cosmetics and Victoria’s Secret.

These merchants may feel they have no choice but to pass on the increases to customers, perhaps sparking more inflation.

If Trump’s tariffs do come to fruition, Shopify’s president Harley Finkelstein pointed out China is “not a huge area” for Shopify.

However, “we can’t anticipate what every presidential administration is going to do,” he cautioned.

He likened the uncertainty facing the business community to the COVID-19 pandemic where Shopify had to help companies migrate online.

“Our job is no matter what comes the way of our merchants, we provide them with tools and service and support for them to navigate it really well,” he said.

Finkelstein was questioned about the forthcoming U.S. leadership change on a call meant to delve into Shopify’s latest earnings, which sent shares soaring 27 per cent to $158.63 shortly after Tuesday’s market open.

The Ottawa-based company, which keeps its books in U.S. dollars, reported US$828 million in net income for its third quarter, up from US$718 million in the same quarter last year, as its revenue rose 26 per cent.

Revenue for the period ended Sept. 30 totalled US$2.16 billion, up from US$1.71 billion a year earlier.

Subscription solutions revenue reached US$610 million, up from US$486 million in the same quarter last year.

Merchant solutions revenue amounted to US$1.55 billion, up from US$1.23 billion.

Shopify’s net income excluding the impact of equity investments totalled US$344 million for the quarter, up from US$173 million in the same quarter last year.

Daniel Chan, a TD Cowen analyst, said the results show Shopify has a leadership position in the e-commerce world and “a continued ability to gain market share.”

In its outlook for its fourth quarter of 2024, the company said it expects revenue to grow at a mid-to-high-twenties percentage rate on a year-over-year basis.

“Q4 guidance suggests Shopify will finish the year strong, with better-than-expected revenue growth and operating margin,” Chan pointed out in a note to investors.

This report by The Canadian Press was first published Nov. 12, 2024.

Companies in this story: (TSX:SHOP)

The Canadian Press. All rights reserved.

Source link

Continue Reading

Business

RioCan cuts nearly 10 per cent staff in efficiency push as condo market slows

Published

 on

 

TORONTO – RioCan Real Estate Investment Trust says it has cut almost 10 per cent of its staff as it deals with a slowdown in the condo market and overall pushes for greater efficiency.

The company says the cuts, which amount to around 60 employees based on its last annual filing, will mean about $9 million in restructuring charges and should translate to about $8 million in annualized cash savings.

The job cuts come as RioCan and others scale back condo development plans as the market softens, but chief executive Jonathan Gitlin says the reductions were from a companywide efficiency effort.

RioCan says it doesn’t plan to start any new construction of mixed-use properties this year and well into 2025 as it adjusts to the shifting market demand.

The company reported a net income of $96.9 million in the third quarter, up from a loss of $73.5 million last year, as it saw a $159 million boost from a favourable change in the fair value of investment properties.

RioCan reported what it says is a record-breaking 97.8 per cent occupancy rate in the quarter including retail committed occupancy of 98.6 per cent.

This report by The Canadian Press was first published Nov. 12, 2024.

Companies in this story: (TSX:REI.UN)

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version