What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Influenza vaccines are updated through year-round monitoring of circulating viruses and expert review. The World Health Organization (WHO) recommends components separately for the Northern and Southern Hemisphere seasons; national authorities then decide which formulations to approve. For the 2026–2027 Northern Hemisphere season, the recommended components differ by production platform, and all three components of U.S. seasonal vaccines changed from the previous season.
Why influenza vaccine composition is reviewed each season
Influenza viruses evolve, so the viruses circulating in a new season may differ from those represented by existing vaccine components. Regular review lets experts assess whether the composition should change; it does not mean that every component must change every year.
The scale of influenza helps explain why this process matters. WHO’s 2026 announcement estimates around 1 billion seasonal cases worldwide each year, including 3–5 million cases of severe illness and 290,000–650,000 respiratory deaths. These are annual global estimates, not counts for one particular season.
How experts select components for a future season
1. Monitor influenza around the world
WHO coordinates the Global Influenza Surveillance and Response System (GISRS), working with national partners and laboratories. CDC describes representative viruses being sent by laboratories to WHO Collaborating Centres for characterization. The evidence includes genetic and antigenic characteristics, patterns of influenza activity, epidemiological and clinical information, and vaccine-serology results.
Free tools Windows power users keep installed
One-click scans. No signup required.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
2. Assess how circulating viruses relate to current vaccines
Experts review the circulating viruses alongside their characterization and vaccine-response evidence. The aim is to judge which virus components are appropriate for an upcoming season. WHO’s consultations explicitly consider virus characterization, influenza activity, and vaccine serology.
3. Make separate recommendations for each hemisphere
WHO holds composition consultations in February for the Northern Hemisphere and September for the Southern Hemisphere. It issues recommendations rather than a single worldwide product approval. The recommendations reflect the needs of the respective upcoming seasons.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
4. National authorities and manufacturers act on the recommendations
WHO says national agencies and pharmaceutical companies use its recommendations to develop, produce, and license vaccines. In the United States, the FDA’s Vaccines and Related Biological Products Advisory Committee (VRBPAC) reviews and recommends the domestic composition, and FDA informs approved manufacturers. CDC publishes U.S. season guidance. The authorities responsible for approval and formulation can differ by country.
Why vaccine components can differ by production platform
A recommended virus component may vary depending on whether a vaccine is egg-based or made using cell culture, recombinant protein, or a nucleic acid-based platform. For the 2026–2027 Northern Hemisphere recommendation, the H1N1-like component is the same across the listed platforms, while the H3N2-like and B/Victoria-like components differ.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Those differences describe the recommendations for that season and platform; they do not establish that one platform is universally preferable. WHO’s recommendations are also distinct from a country’s final product approvals.
2026–2027 Northern Hemisphere components
WHO’s recommendation lists the following three components for each platform. The names are virus-like components, not a single formulation that applies to every country and product.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
| Platform | H1N1-like component | H3N2-like component | B/Victoria lineage-like component |
|---|---|---|---|
| Egg-based | A/Missouri/11/2025 (H1N1)pdm09-like | A/Darwin/1454/2025 (H3N2)-like | B/Tokyo/EIS13-175/2025 (B/Victoria lineage)-like |
| Cell culture, recombinant protein, or nucleic acid-based | A/Missouri/11/2025 (H1N1)pdm09-like | A/Darwin/1415/2025 (H3N2)-like | B/Pennsylvania/14/2025 (B/Victoria lineage)-like |
CDC reports that all three components of U.S. 2026–2027 seasonal vaccines changed from 2025–2026. The H3N2 update was intended to protect against subclade K, which spread widely during the 2025–2026 season.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the U.S. supply projections say
For the United States’ 2026–2027 season, CDC reported manufacturer projections of up to 135 million doses. This is a projected supply, not a final count of doses administered. CDC also reported that 100% of projected supply would be trivalent, 27% non-egg-based, and 99% without thimerosal as a preservative. These percentages describe projected U.S. supply for that season.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Why hemisphere and country matter
A Northern Hemisphere recommendation should not be treated as the global formulation. WHO published a separate 2027 Southern Hemisphere recommendation on September 25, 2026, with recommendations for egg-based and cell culture, recombinant protein, or nucleic acid-based vaccines. Countries make their own decisions about the vaccine compositions and formulations approved for use in their jurisdictions.
What happens after the recommendation
The recommendation informs national regulatory decisions and manufacturers’ development, production, and licensing work. The official process descriptions establish those stages, but do not give a complete step-by-step manufacturing timeline or an exact interval from recommendation to batch release. Nor do the available composition announcements establish published efficacy results for the newly selected 2026–2027 components.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
