Sorry, You Might Get the Flu Twice This Year — Here’s Why
By Julia Ries
- Two flu strains are overlapping each other this flu season.
- This means you can get sick twice from different flu strains.
- While the flu vaccine isn't a perfect match, it's the best defense against the flu.
To say this flu season has been abnormal is an understatement.
For one, the flu season got its earliest start in 16 years.
Up to 18 million people have gotten the flu this year, according to the Centers for Disease Control and Prevention's (CDC) latest estimates. Up to 210,000 people have been hospitalized and thousands have died, including 39 children.
We're also seeing B strains of the flu dominate, something that hasn't happened in the United States in nearly 30 years.
And, unfortunately, the vaccine missed the mark with B/Victoria, the most common strain we're seeing this year. The CDC believes the shot only covers about 58 percent of B-linked cases.
Now, halfway through flu season, A strains are picking up, increasing the odds we'll have a "double-barreled flu season," in which two strains strike back to back — a pattern health experts say is extremely rare.
Between the early start, rise in B strains, and recent spike in A-strain illnesses, this flu season officially has infectious disease experts stumped.
"This season has turned a lot of [what we know about flu] on its head," said Dr. William Schaffner, an infectious disease specialist with Vanderbilt University Medical Center and the medical director at the National Foundation for Infectious Diseases. "There's a lot we know, and even more we don't know about flu."
Double-Barreled Flu Season
A double-barreled flu season occurs when two flu outbreaks overlap one another, a pattern which is very unusual, according to flu experts.
Last year, for example, we saw A/H1N1 infections peak early, followed by another wave of A/H3N2 infections.
Though the predominant strains are different this year, we're seeing the same pattern play out: Activity took off with B/Victoria and now that second wave of A/H1N1 is coming for us, according to Schaffner.
"Around the country, my colleagues and I are seeing H1N1 come up strong, and it's now about 50-50 [with B/Victoria]," Schaffner told Healthline.
The most worrisome part of a double-barreled flu season is that you can get sick twice.
Just because you caught a B-strain flu doesn't mean that you're immune from the A strains.
"There will be the rare person who gets two flu infections in the same season — one with B and one with H1N1," Schaffner said.
Though there will be some protection within each strain — in that contracting an A strain will protect you against other A strains, and B strains will protect against other B's — there's not much cross protection.
A double-barreled season also means we're more likely to see a prolonged influenza season.
What to Know About B and A Strains
The fact that B strains are predominating this year isn't just confusing, it's concerning as well.
B strains haven't hit this hard for nearly 30 years, since during the 1992–1993 season, the CDC told Healthline.
This means that many people — especially kids — have never been exposed to the strain, and consequently, don't have residual immunity against it.
"When there's a rarity, it actually sets you up for another bigger push to get it, because at that point, we really don't have anybody with any strong immunity going around, so we're all potential vessels for getting exposed and transmitting it," Moore said.
This is one of the reasons kids are being hit harder this year. They've never been exposed to this type of the flu — it's their first go around.
"These kids are just brand new to getting flu B," Moore said.
And because we haven't seen much of the B/Victoria strain in the past few years, this year's vaccine missed the mark.
"We thought initially the match was perfect, but it's not. It's off a little bit, and that means in many populations the vaccine is not going to function optimally," Schaffner explained.
Fortunately, the vaccine covers H1N1 well. According to Schaffner, the match to H1N1 is right on.
And because A strains circulate every year, most people have built up at least some "immune memory" to it — despite the fact these strains change and mutate each year.
"Our past experience with influenza viruses does give us some residual protection that lasts," Schaffner said.
There’s Still Time to Get Vaccinated
"It's not too late," Moore said about the vaccine, noting that we still don't know for sure what's going to happen next.
If flu A continues to get worse, as predicted, the flu shot will protect you through the rest of the season.
And even though the vaccine isn't a perfect match to B strains, it can still help lessen the severity of the flu.
"If you've been vaccinated, and even if there is a mismatch, you are likely to have a less severe infection when you get it," Schaffner said.
Remember: By getting immunized, you're not only protecting yourself, but others as well who may be more at risk for developing severe complications — like the elderly, pregnant women, children under 2, and immunosuppressed people.
"When we protect ourselves, we are really protecting those around us," Moore said.
The Bottom Line
Health experts say this has been an extremely unusual flu season. It started very early with a strain that we typically don't see much of. Now, another strain is building momentum and creating a path for what's known as a double-barreled flu season, in which two types of flu strike back to back. With a second wave coming, flu experts say it's not too late to get vaccinated before things pick up again.
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By Hui Hu
Winter is supposed to be the best season for wind power – the winds are stronger, and since air density increases as the temperature drops, more force is pushing on the blades. But winter also comes with a problem: freezing weather.
Comparing rime ice and glaze ice shows how each changes the texture of the blade. Gao, Liu and Hu, 2021, CC BY-ND
Ice buildup changes air flow around the turbine blade, which can slow it down. The top photos show ice forming after 10 minutes at different temperatures in the Wind Research Tunnel. The lower measurements show airflow separation as ice accumulates. Icing Research Tunnel of Iowa State University, CC BY-ND
EcoWatch Daily Newsletter
While traditional investment in the ocean technology sector has been tentative, growth in Israeli maritime innovations has been exponential in the last few years, and environmental concern has come to the forefront.
theDOCK aims to innovate the Israeli maritime sector. Pexels<p>The UN hopes that new investments in ocean science and technology will help turn the tide for the oceans. As such, this year kicked off the <a href="https://www.oceandecade.org/" target="_blank" rel="noopener noreferrer">United Nations Decade of Ocean Science for Sustainable Development (2021-2030)</a> to galvanize massive support for the blue economy.</p><p>According to the World Bank, the blue economy is the "sustainable use of ocean resources for economic growth, improved livelihoods, and jobs while preserving the health of ocean ecosystem," <a href="https://www.sciencedirect.com/science/article/pii/S0160412019338255#b0245" target="_blank" rel="noopener noreferrer">Science Direct</a> reported. It represents this new sector for investments and innovations that work in tandem with the oceans rather than in exploitation of them.</p><p>As recently as Aug. 2020, <a href="https://www.reutersevents.com/sustainability/esg-investors-slow-make-waves-25tn-ocean-economy" target="_blank" rel="noopener noreferrer">Reuters</a> noted that ESG Investors, those looking to invest in opportunities that have a positive impact in environmental, social and governance (ESG) issues, have been interested in "blue finance" but slow to invest.</p><p>"It is a hugely under-invested economic opportunity that is crucial to the way we have to address living on one planet," Simon Dent, director of blue investments at Mirova Natural Capital, told Reuters.</p><p>Even with slow investment, the blue economy is still expected to expand at twice the rate of the mainstream economy by 2030, Reuters reported. It already contributes $2.5tn a year in economic output, the report noted.</p><p>Current, upward <a href="https://www.ecowatch.com/-innovation-blue-economy-2646147405.html" target="_self">shifts in blue economy investments are being driven by innovation</a>, a trend the UN hopes will continue globally for the benefit of all oceans and people.</p><p>In Israel, this push has successfully translated into investment in and innovation of global ports, shipping, logistics and offshore sectors. The "Startup Nation," as Israel is often called, has seen its maritime tech ecosystem grow "significantly" in recent years and expects that growth to "accelerate dramatically," <a href="https://itrade.gov.il/belgium-english/how-israel-is-becoming-a-port-of-call-for-maritime-innovation/" target="_blank" rel="noopener noreferrer">iTrade</a> reported.</p><p>Driving this wave of momentum has been rising Israeli venture capital hub <a href="https://www.thedockinnovation.com/" target="_blank" rel="noopener noreferrer">theDOCK</a>. Founded by Israeli Navy veterans in 2017, theDOCK works with early-stage companies in the maritime space to bring their solutions to market. The hub's pioneering efforts ignited Israel's maritime technology sector, and now, with their new fund, theDOCK is motivating these high-tech solutions to also address ESG criteria.</p><p>"While ESG has always been on theDOCK's agenda, this theme has become even more of a priority," Nir Gartzman, theDOCK's managing partner, told EcoWatch. "80 percent of the startups in our portfolio (for theDOCK's Navigator II fund) will have a primary or secondary contribution to environmental, social and governance (ESG) criteria."</p><p>In a company presentation, theDOCK called contribution to the ESG agenda a "hot discussion topic" for traditional players in the space and their boards, many of whom are looking to adopt new technologies with a positive impact on the planet. The focus is on reducing carbon emissions and protecting the environment, the presentation outlines. As such, theDOCK also explicitly screens candidate investments by ESG criteria as well.</p><p>Within the maritime space, environmental innovations could include measures like increased fuel and energy efficiency, better monitoring of potential pollution sources, improved waste and air emissions management and processing of marine debris/trash into reusable materials, theDOCK's presentation noted.</p>
theDOCK team includes (left to right) Michal Hendel-Sufa, Head of Alliances, Noa Schuman, CMO, Nir Gartzman, Co-Founder & Managing Partner, and Hannan Carmeli, Co-Founder & Managing Partner. Dudu Koren<p>theDOCK's own portfolio includes companies like Orca AI, which uses an intelligent collision avoidance system to reduce the probability of oil or fuel spills, AiDock, which eliminates the use of paper by automating the customs clearance process, and DockTech, which uses depth "crowdsourcing" data to map riverbeds in real-time and optimize cargo loading, thereby reducing trips and fuel usage while also avoiding groundings.</p><p>"Oceans are a big opportunity primarily because they are just that – big!" theDOCK's Chief Marketing Officer Noa Schuman summarized. "As such, the magnitude of their criticality to the global ecosystem, the magnitude of pollution risk and the steps needed to overcome those challenges – are all huge."</p><p>There is hope that this wave of interest and investment in environmentally-positive maritime technologies will accelerate the blue economy and ESG investing even further, in Israel and beyond.</p>
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Tamara Lindeman certainly doesn't seem particularly anxious, or grief stricken, or angry. In fact, in a recent Zoom conversation, the Toronto-based singer-songwriter (who records and performs under the name The Weather Station) comes across as friendly, thoughtful, and a little shy.
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