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Onsite Health News and Updates

Subclade K and Why the Flu Vaccine Still Helps Protect You

Written by Onsite Health Team on May 21, 2026. Posted in Education. No Comments on Subclade K and Why the Flu Vaccine Still Helps Protect You

You may have seen reports about subclade K, a newer influenza A(H3N2) variant that drove a strong Northern Hemisphere flu season. It has also been referred to in media reports as “super K”. That kind of headline can make people wonder if the flu vaccine is still worth having. The short answer is yes. Current New Zealand guidance still recommends annual flu vaccination, and Health New Zealand says the 2026 Southern Hemisphere vaccine available in New Zealand includes coverage for circulating A(H3N2) variants, including strains related to subclade K.

What subclade K is

Subclade K is a branch of the influenza A(H3N2) virus. Influenza viruses change often, which is why vaccine strains are reviewed and updated every year. The Eurosurveillance study deleted looked at the early 2025 to 2026 flu season in England, where influenza A(H3N2) subclade K became the dominant strain early in the season. The paper also noted that this variant showed antigenic differences from the vaccine strain used in that Northern Hemisphere season.

That sounds worrying, but it does not mean the vaccine stopped working. It means scientists needed to measure how much real world protection remained, especially against more serious illness.

What the research found

A 2025 study published in Eurosurveillance examined the early flu season in England during autumn 2025, when influenza A(H3N2) subclade K was the dominant circulating strain, to assess how well the seasonal flu vaccine was still protecting people against more serious illness.

The main value of this study is that it looked at real world vaccine effectiveness, not just laboratory matching. Even though subclade K differed from the vaccine strain in antigenic testing, the researchers still found meaningful protection against influenza linked emergency department attendance and hospital admission.

That is an important clinical point. Flu vaccines do not need to stop every infection to be useful. Reducing severity, lowering the chance of hospital care, and helping protect people at higher risk are all worthwhile outcomes. This is especially relevant for H3N2 seasons, because H3N2 strains are often linked with more severe illness in older adults.

What this means for New Zealand

New Zealand is not using the exact same seasonal flu vaccine that England used in autumn 2025. Our 2026 Southern Hemisphere vaccine was selected later, using updated international surveillance and regional expert review. Medsafe says the Australian Influenza Vaccine Committee, with a New Zealand representative, consulted on the 2026 vaccine composition for New Zealand, Australia and South Africa in October 2025. For 2026, the recommended H3N2 components are A/Singapore/GP20238/2024 like virus for egg based vaccines and A/Sydney/1359/2024 like virus for cell based, recombinant based, or nucleic acid based vaccines.

Health New Zealand has also made the local message very clear. Its flu vaccine guidance states that the 2026 Southern Hemisphere influenza vaccine available in New Zealand includes coverage for circulating A(H3N2) variants, including strains related to subclade K. That does not mean perfect protection against every infection. It does mean the vaccine has been updated with current strain information in mind, and it remains the best available tool for reducing flu risk this winter.

Why vaccination still matters

The flu vaccine helps in more than one way. It can reduce the chance of infection, but even when infection happens, it may lower the severity of illness. That is one reason public health advice still backs vaccination during seasons where the virus has changed. Health New Zealand says the flu virus changes often, which is why the vaccine is adjusted each year. The Immunisation Advisory Centre also notes that there are four influenza vaccines available in New Zealand for 2026, including egg based, cell based, and adjuvanted options.

This matters most for people who are more likely to become seriously unwell, including older adults, pregnant women, young children, and people with long term health conditions. Healthify notes that the flu can cause serious illness, especially in young children, older adults, and people with long term health problems.

The practical takeaway

The research on subclade K gives a useful message for New Zealand. Even when an H3N2 strain has drifted away from the vaccine strain in laboratory testing, the vaccine can still provide meaningful real world protection, especially against more serious illness. For New Zealanders, that sits alongside current local guidance that the 2026 vaccine includes coverage for circulating H3N2 variants related to subclade K.

So if you have seen headlines about subclade K and wondered whether the flu vaccine still helps, the evidence points in a practical direction. Yes, it does. It may not stop every case, but it remains one of the best ways to lower your risk of severe flu this winter.

References

Health New Zealand. (2025, November 19). Flu (influenza) vaccine.

Healthify. (n.d.). Influenza vaccine, adults.

Immunisation Advisory Centre. (2026). Influenza immunisation programme.

Immunisation Advisory Centre. (2026). Influenza vaccine.

Kirsebom, F. C. M., Andrews, N., Tessier, E., et al. (2025). Early influenza virus characterisation and vaccine effectiveness in England in autumn 2025, a period dominated by influenza A(H3N2) subclade K. Eurosurveillance, 30(46), Article 2500854.

Medsafe. (2025, November 10). Influenza vaccine composition.

handing over voucher or prescription at a pharmacy to a pharmacist

Onsite Health Begins Sending 2026 Flu Vouchers to Clients

Written by Onsite Health Team on April 23, 2026. Posted in News. No Comments on Onsite Health Begins Sending 2026 Flu Vouchers to Clients

Our 2026 flu vouchers started going out to clients at the beginning of April. In New Zealand, flu vaccines become available from 1 April each year, and annual vaccination is recommended before or during the winter flu season. Protection is not instant, it usually takes about two weeks for the body to build a good immune response after vaccination. Sending vouchers early helps employers give staff enough time to get protected before flu activity builds through winter.

Why we send 2026 flu vouchers in April

Health New Zealand advises that the flu vaccine is available from 1 April, and recommends yearly flu vaccination for everyone aged over 6 months. The Immunisation Advisory Centre also advises annual vaccination because influenza strains change, and the vaccine is updated to match the strains most likely to circulate.

From a clinical point of view, early vaccination is practical. The aim is to have protection in place before flu spreads widely through workplaces, households, schools, and public spaces. For businesses, that matters because influenza can move quickly through teams and lead to several staff being away at the same time.

Who 2026 flu vouchers are for

Flu vouchers are useful for staff who cannot attend an onsite workplace vaccination clinic. That includes people working from home, staff who travel, employees based in other regions, and anyone who is away on the day of the workplace visit. They also suit organisations with smaller teams, or those spread across more than one site.

This is one of the practical strengths of a voucher programme. A business may run an onsite clinic for head office staff, while also giving vouchers to people in regional offices or remote roles. That helps employers extend coverage across the wider team, rather than limiting access to one location or one day. Onsite Health’s flu voucher offering is designed for this kind of nationwide staff coverage.

How Onsite Health distributes flu vouchers

We send flu vouchers to the client, not directly to individual staff members. This gives employers more control and flexibility over how vouchers are shared across their team. A business can decide who needs a voucher, when it should be sent, and how it should be distributed internally. This works well for organisations with a mix of office based staff, remote workers, travelling employees, or teams spread across different locations. It also makes it easier to manage last minute changes, staff absences, and new starters. By sending vouchers to the client for internal distribution, we help keep the process simple, practical, and easy to manage.

Where staff can redeem flu vouchers

Our 2026 flu vouchers can be redeemed at selected GP surgeries and vaccinating Unichem and Life Pharmacies throughout New Zealand. This gives staff a simple option close to home or work, rather than needing to travel to a main office for vaccination. For employers with teams in more than one city, this makes planning easier and more inclusive.

Vouchers are emailed directly to the client for internal distribution to staff. This keeps the process simple and allows employers to send them to the right people quickly. There is also no minimum number required to purchase flu vouchers, which makes them a practical option for both small and large teams.

How flu vouchers support nationwide staff coverage

Many New Zealand businesses no longer work from one central office. Some teams are hybrid, some are fully remote, and some are spread across regional branches. A flu voucher programme helps employers respond to that change in a practical way.

From a health point of view, wider vaccine access improves the chance that more staff will be vaccinated before winter peaks. Many employers already support flu vaccination because it helps reduce the risk of severe illness and can lower disruption during winter. Easier access usually supports better uptake. When people can get vaccinated in their own area, at a pharmacy or clinic that suits them, there are fewer barriers around time, travel, and logistics.

This approach also gives staff flexibility. Some people may miss an onsite clinic because of leave, meetings, travel, or shift patterns. A voucher gives them another way to be included, increasing workforce coverage.

A practical step before winter

Sending 2026 flu vouchers in April is a simple but important part of winter planning. It matches the start of the New Zealand flu vaccination season, supports timely protection, and helps employers reach staff across different locations. For many organisations, vouchers are not a replacement for onsite clinics, but an added layer of access.

Sources

Health New Zealand, Te Whatu Ora. (2025, November 19). Flu (influenza) vaccine.

Health New Zealand, Te Whatu Ora. (2026, April 2). Health NZ urges people to get vaccinated ahead of winter.

Immunisation Advisory Centre. (2025, March 6). Influenza vaccine.

Immunisation Advisory Centre. (n.d.). Influenza.

pleased-nurse-with-her-suitcase-looking-away

Onsite Health is Now Vaccinating Across Auckland

Written by Onsite Health Team on April 16, 2026. Posted in News. No Comments on Onsite Health is Now Vaccinating Across Auckland

Workplace flu vaccinations have started for 2026

We have now started providing 2026 flu vaccinations across Auckland. Our workplace clinics began at the start of April, which gives Auckland businesses the chance to protect staff before flu activity builds through winter. We are taking bookings for the rest of the season, which lasts until June.

Flu protection is not immediate. The flu vaccine usually takes up to two weeks to build good protection, which is why vaccination is recommended before or during the early part of the New Zealand flu season. Health New Zealand and the Immunisation Advisory Centre both advise annual flu vaccination because influenza viruses change regularly and the vaccine is updated each year to match the strains expected to circulate.

Why timing matters for Auckland workplaces

In New Zealand, flu is most common during winter. It spreads easily through coughing, sneezing, and close contact. In busy offices, warehouses, customer facing workplaces, and shared staff areas, one case can quickly become several. That can mean disruption, sick leave, and pressure on teams during an already busy part of the year.

That is why we start workplace flu vaccinations in April. Vaccinating early helps staff build protection before influenza spreads more widely in the community. It also gives employers more choice around booking dates and helps avoid the rush that often comes later in autumn and early winter.

How our workplace vaccination service works

We keep the process simple and practical. After a workplace books with us, we confirm the date, time, site details, and expected staff numbers. We then attend the workplace and provide vaccinations onsite through an authorised vaccinator. Staff complete consent before vaccination, and we advise a 15 minute post vaccination wait period afterwards.

This approach helps remove common barriers. Staff do not need to arrange separate appointments, drive to a clinic, or take extra time out of the day. Making flu vaccination easy usually improves uptake, which is important in workplaces where higher participation can help reduce the spread of infection between colleagues. The Immunisation Advisory Centre notes that many employers offer flu vaccination to staff as part of good winter health planning.

Vaccine options for 2026

For 2026, we are offering two flu vaccine options, a traditional egg based vaccine and Flucelvax®, which is a cell based vaccine. Both are designed to protect against the influenza strains expected to circulate during the coming winter.

The 2026 vaccine strains reflect the World Health Organization recommendation for the Southern Hemisphere season. As with every year, the strain mix has been updated because influenza viruses change over time. This annual update is one reason a flu vaccination is recommended each year, even for people who had one last winter.

Workplace flu vaccinations across Auckland

We provide workplace flu vaccinations across Auckland, including key business areas and larger employment hubs such as Auckland CBD, Newmarket, Parnell, Grafton, Penrose, Mount Wellington, Ellerslie, Greenlane, Onehunga, East Tamaki, Highbrook, Mount Eden, Albany, Takapuna, Rosedale, Wairau Valley, Henderson, Westgate, Airport Oaks, Māngere, and Manukau.

If you are looking to book workplace flu vaccinations across Auckland, we can arrange an onsite clinic at your workplace and help make the process simple for your team. Feel free to reach out to us if you are not sure if we cover your Greater Auckland location.

Support for remote and flexible teams

Not every employee is in the office on vaccination day. Some work remotely, are travelling, or are based outside Auckland. To support these staff, we also offer flu vouchers that can be redeemed at selected clinics and pharmacies across New Zealand. This gives employers a practical way to include more of their team in the vaccination programme, even when staff are spread across different locations.

Don’t miss out on protecting your staff this winter

Annual flu vaccination remains one of the most effective ways to reduce the risk of influenza and its complications. It also supports staff wellbeing and helps workplaces prepare for the winter months with less disruption.

We have already started our 2026 workplace flu vaccinations across Auckland. If your business is planning ahead for winter, now is a good time to book. Reach out to our friendly team to organise a date and time that is right for your staff.

Sources

Health New Zealand. (2025, November 19). Flu (influenza) vaccine.

Health New Zealand. (2025, August 7). Flu (influenza).

Immunisation Advisory Centre. (2025, March 6). Influenza vaccine.

Immunisation Advisory Centre. (2025). Influenza.

Immunisation Advisory Centre. (2026, February 16). Guidelines for post-vaccination wait times.

People scheduling flu vaccination appointments

Onsite Health Now Taking 2026 Flu Vaccination Bookings

Written by Onsite Health Team on February 19, 2026. Posted in News. No Comments on Onsite Health Now Taking 2026 Flu Vaccination Bookings

We are now taking bookings for 2026 workplace flu vaccinations across Auckland. If you are planning ahead for the New Zealand Flu Season, now is the time to act. Employers who book early secure their preferred dates and ensure staff receive protection before winter peaks.

The Ministry of Health advises that influenza vaccination is the best way to reduce the risk of severe illness and hospitalisation. Vaccination also reduces disruption in workplaces during winter.

If you are looking to book workplace flu vaccinations in Auckland, we have opened our 2026 schedule.

NZ flu season timeline for 2026

Planning around the New Zealand Flu Season is important. Influenza activity usually increases from May and continues through winter, often peaking between June and August according to Health New Zealand.

We began taking bookings shortly after Waitangi Weekend. This allows employers to secure dates well before the winter rush.

We begin providing workplace flu vaccinations from early April. We also start issuing flu vouchers to clients in early April for remote staff or those who cannot attend onsite clinics.

The optimal time to receive a flu vaccination is April and May (Immunisation Advisory Centre). Protection develops around two weeks after vaccination. Early vaccination ensures immunity is in place before influenza spreads widely in the community.

Demand increases rapidly through May. Many workplaces aim to complete vaccinations before June. We usually finish taking bookings for onsite workplace visits at some point in June. Booking early reduces the risk of missing out on preferred dates and optimal immunity coverage for your staff.

How the workplace flu vaccination process works

Our process is simple and designed to minimise disruption to your workplace.

1. Contact us

After you contact us, we will organise a suitable time for one of our Vaccinator to visit your workplace. We confirm the number of staff and discuss any site specific requirements.

2. Preparation

Before the visit, you will receive confirmation of the date and time. We provide posters and pamphlets to promote the clinic internally. We also send reminder emails to the organiser. Clear communication improves attendance and reduces last minute questions.

3. On the day

Our Vaccinator arrives prior to the agreed time with all required clinical equipment. Staff complete a consent form before vaccination.

We require a first aid certified staff member to be present onsite during the clinic. This ensures workplace health and safety requirements are met. Vaccination is administered by an authorised vaccinator in line with Ministry of Health guidelines. The process is efficient and usually takes only a few minutes per person.

4. After vaccination

Staff are advised to remain onsite for at least 15 minutes after receiving the vaccine. This allows monitoring for any immediate reactions, which are uncommon. Our Vaccinator remains onsite for 15 minutes after the last vaccination has been given.

For staff who are absent on the day, flu vouchers can be ordered. These vouchers allow employees to receive their vaccination at selected GP clinics or pharmacies across New Zealand.

Why book early for 2026

Early vaccination means better protection. The Ministry of Health recommends annual influenza vaccination because influenza strains change each year and immunity from previous seasons declines over time. Protection takes around two weeks to develop after vaccination, so receiving the vaccine in April or May allows immunity to build before winter transmission increases. When staff are vaccinated before influenza begins circulating widely, workplaces are better protected during peak months.

Demand for workplace flu vaccinations increases quickly once flu cases begin appearing in the media and in local communities. Each year we see a sharp rise in booking requests during May. Organisations that delay often find their preferred dates are no longer available. Booking early for 2026 reduces pressure later in the season and ensures vaccination can be completed at the most effective time.

Early planning also supports staff awareness. When employers communicate vaccination dates well in advance, uptake improves. Higher participation reduces the likelihood of workplace outbreaks and staff sick leave.

Taking action before winter protects productivity, reduces unexpected absence, and supports staff wellbeing throughout the 2026 New Zealand Flu Season.

To book workplace flu vaccinations across Auckland, contact Onsite Health today and secure your 2026 vaccination date before our schedule fills.

Health professional applies plaster to vaccinated area on professional woman

What Global Flu Trends mean for New Zealand’s 2026 Flu Season

Written by Onsite Health Team on February 5, 2026. Posted in Education. No Comments on What Global Flu Trends mean for New Zealand’s 2026 Flu Season

2025-2026: A Severe Northern Hemisphere Flu Season

Health authorities across the Northern Hemisphere have reported a strong and early flu season. The United States, United Kingdom and parts of Europe recorded high case numbers and pressure on emergency departments during their winter months. The US Centers for Disease Control and Prevention recorded a sharp rise in emergency visits and admissions linked to influenza, particularly among older adults and young children. The UK Health Security Agency also confirmed sustained flu activity, with hospitals managing increased pressure during peak weeks.

According to reporting by National Geographic, a new H3N2 influenza A subclade has played a key role in the rise in cases, with genetic changes that may reduce how well prior immunity recognises the virus. Influenza A H3N2 strains were linked with more severe illness in older adults. Experts interviewed by National Geographic explained that flu seasons often move in a pattern between hemispheres, with strains circulating south before spreading north.

“There’s a ping-pong effect between Northern and Southern Hemisphere flu seasons… Whatever is there eventually makes its way up to us, and vice versa.” — Marcus Pereira, infectious diseases physician.

New Zealand does not experience flu in isolation. Influenza viruses travel with people, and global movement allows strains to spread between countries within days. The Northern Hemisphere winter provides valuable data for scientists and public health planners.

What This Means for the New Zealand Flu Season

The World Health Organisation monitors circulating strains across both hemispheres. Each year, experts review genetic sequencing data, hospital trends, and laboratory reports. They then recommend which strains should be included in the Southern Hemisphere vaccine. This process allows vaccine manufacturers to prepare doses that target the strains most likely to circulate during our New Zealand Flu Season.

If H3N2 strains remain dominant overseas, there is a strong chance similar strains will appear here. That does not mean our season will be identical, but patterns often repeat. Keeping track of the flu season in the Northern Hemisphere gives us time to prepare.

While vaccine effectiveness can vary year to year, public health data still showed that vaccinated people had lower rates of hospitalisation and severe illness. Even in seasons where strain match is not perfect, vaccination reduces risk. That remains an important message as we look ahead to our own New Zealand Flu Season.

What This Means for You

The New Zealand Flu Season typically runs from May to September, with peak transmission in winter. Flu spreads easily through coughing, sneezing, close contact, and contaminated surfaces. Workplaces, schools, public transport, and family gatherings all create opportunities for exposure.

A severe flu season overseas can signal a challenging winter at home. For most healthy adults, influenza causes fever, body aches, cough, and fatigue that can last a week or more. Many people require three to five days off work. Some need longer recovery. For older adults, pregnant women, young children, and people with long term medical conditions, flu can lead to pneumonia or hospital admission.

Time off work affects productivity and income. Businesses feel the impact when multiple staff members are absent at once. Families feel strain when parents are unwell while caring for children. Not everyone with influenza shows obvious symptoms, yet they can still pass the virus on. Protecting yourself also protects grandparents, infants, and those with weakened immune systems.

Vaccination remains the most effective way to reduce serious illness from influenza. It does not prevent every case, but it lowers the chance of severe disease, hospitalisation, and complications. In seasons with strong viral activity, this protection becomes even more important.

How Onsite Health Can Help

Higher vaccination rates within a workplace can reduce the spread of influenza between colleagues. Fewer sick days mean more consistent productivity and less disruption to operations. Employers also send a clear message that they value staff wellbeing.

Onsite Health supports workplaces across Auckland by delivering flu vaccinations to staff in workplace settings. Our clinical team follows national guidelines and works to ensure safe administration for staff. We make the process simple, efficient, and accessible. Workplace vaccination programmes reduce barriers such as time, travel, and cost concerns. When vaccination is convenient, uptake improves.

Preparing early for the New Zealand Flu Season allows individuals and businesses to stay ahead of potential disruption. Global flu trends give us warning. Vaccination gives us protection. By acting before winter peaks, we reduce risk to ourselves, our workplaces, and the vulnerable people in our communities. Book now to protect your staff from influenza this winter.