Influenza A is circulating in the community, with people across Christchurch and other parts of Aotearoa New Zealand reporting flu-like illness. As winter continues, health authorities are reminding people to stay home when unwell, practise good hygiene and take extra care around those at higher risk of serious illness.
Influenza, commonly known as the flu, can arrive suddenly and leave people feeling significantly more unwell than they would with an ordinary cold. Fever, chills, headaches, body aches, exhaustion, coughing and sore throat are among the common symptoms.
While most people recover at home with rest and fluids, influenza can sometimes lead to serious complications, particularly for young children, older adults, pregnant people and those living with certain health conditions.
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Health New Zealand says influenza is normally worse than a cold and that symptoms can begin one to four days after infection. The most severe symptoms often last around five days, although a cough can continue for two to three weeks.
Influenza A circulating as New Zealand remains in flu season
Influenza activity is a normal part of the winter respiratory illness season in Aotearoa New Zealand, which generally runs from May through October.
Health New Zealand’s current flu information says influenza spreads rapidly between people through coughing, sneezing, talking, direct contact and contaminated surfaces. Adults are generally most contagious during the first three to five days of illness, while young children may remain contagious for longer.
Recent community reports from Christchurch and other parts of New Zealand have also described people experiencing significant flu-like illness, including cases identified as Influenza A. These reports should be viewed as community experiences rather than official surveillance data or confirmation of a Christchurch-wide outbreak.
Health New Zealand’s 2026 winter plan also identifies influenza, COVID-19, RSV and other respiratory illnesses as seasonal pressures on primary care, emergency departments and hospitals. The plan places particular emphasis on vaccination, early access to primary care and reducing the spread of respiratory infections.
What are the symptoms of Influenza A?
Influenza can develop quickly. Someone may feel reasonably well and then become noticeably sick within a short period.
Common symptoms include:
- Fever or feeling feverish
- Chills or shivering
- Headache
- Muscle and body aches
- Extreme tiredness or fatigue
- Cough
- Sore throat
- Runny or blocked nose
- Upset stomach
- Vomiting or diarrhoea, particularly in some children
Health New Zealand notes that flu symptoms can overlap with other respiratory illnesses, including COVID-19. This means symptoms alone cannot always tell you which virus is responsible.
For some people, the illness may be relatively mild. For others, influenza can be intense enough to require several days of bed rest and can leave fatigue and coughing behind even after the worst symptoms have passed.
How does Influenza A spread?
Influenza spreads through respiratory particles and close contact.
An infected person can release virus particles when they:
- Cough
- Sneeze
- Talk
- Breathe
- Touch surfaces after coughing or sneezing
People can then become infected by breathing in virus particles, getting them into their eyes, nose or mouth, or touching contaminated surfaces and then touching their face.
This is why simple measures such as staying home when sick, washing hands and improving ventilation can make a meaningful difference.
What should you do if you have flu symptoms?
If you become unwell, the most important step is to avoid spreading the illness to other people.
Stay home
Avoid work, school, childcare and unnecessary outings while you are sick.
Health New Zealand advises people with respiratory symptoms to stay home until they are feeling better and their symptoms have gone away. For respiratory illness, people should generally wait until symptoms are improving and they have been fever-free for at least 24 hours without using fever-reducing medicine before returning to normal activities.
If you must leave home to seek medical care, wearing a mask can help reduce the risk of infecting others.
Rest as much as possible
Flu can place considerable demands on the body. Getting enough sleep and allowing yourself time to recover can help you manage the illness.
Trying to push through a severe flu and continuing with normal activities may also increase the chance of passing the virus to other people.
Keep drinking fluids
Fever and illness can increase the risk of dehydration.
Health New Zealand recommends drinking plenty of fluids when you are unwell. Water is a good choice, while other suitable drinks can also contribute to your fluid intake. Signs of dehydration can include a dry mouth, strong thirst, dark urine, passing urine less often, tiredness or confusion.
If someone is struggling to keep fluids down or is passing very little urine, medical advice may be needed.
Can Influenza A be treated at home?
For many otherwise healthy people, influenza can be managed at home.
Rest, fluids and appropriate symptom relief are usually the main elements of self-care. Health New Zealand says antibiotics do not treat influenza because flu is caused by a virus rather than bacteria.
Paracetamol may help relieve fever, headaches, body aches and sore throats when taken according to the instructions on the package. People should be careful not to exceed the recommended dose or accidentally take multiple medicines containing paracetamol.
People who are pregnant, have an existing medical condition, take medicines that affect the immune system or are otherwise at higher risk should speak with a healthcare professional about treatment.
In some circumstances, a healthcare provider may recommend antiviral treatment. This is a decision for a medical professional and may depend on the person’s health, symptoms and risk of complications.
Who is most at risk of serious flu complications?
Influenza can affect anyone, including otherwise healthy adults.
However, Health New Zealand identifies several groups who have a higher risk of complications, including:
- People aged 65 and over
- Babies and young children, particularly those under five
- Pregnant people and those who have recently given birth
- People with conditions such as asthma, diabetes, cancer, heart or lung disease
- People with conditions affecting the immune or nervous systems
- Significantly overweight people
- Some Māori and Pacific peoples aged 55 and over
- People with certain serious mental health or addiction conditions
Families should therefore take particular care when someone in the household has flu symptoms.
Protecting babies, children and older family members
Respiratory viruses can spread quickly through households.
If one family member is sick, try to reduce close contact where practical. A separate, well-ventilated room can help, particularly during the early stages of illness.
Parents and caregivers should pay close attention to children who become unusually sleepy, have difficulty breathing, cannot keep fluids down or show signs of dehydration.
Older family members and people with underlying health conditions may also need closer monitoring.
The aim is not simply to prevent infection but to reduce the chance that a vulnerable person develops severe illness.
Good hygiene can slow the spread
Simple habits remain important during flu season.
Wash your hands regularly with soap and water or use an alcohol-based hand sanitiser. Cover coughs and sneezes with a tissue or your elbow, dispose of used tissues and clean your hands afterwards.
Frequently touched household surfaces such as door handles, taps, light switches, benches and toys should also be cleaned regularly.
Ventilation is another useful measure. Health New Zealand recommends bringing fresh air into indoor spaces, where practical, because improved airflow can reduce the concentration of respiratory virus particles in the air.
Christchurch households can help slow the spread
With influenza and other respiratory viruses circulating during the winter season, individual actions can make a difference.
Staying home when sick may mean missing work, school or social activities for a few days, but it can help prevent another person from becoming seriously ill.
For Christchurch families, the message is straightforward: if you are sick, stay home, rest, drink plenty of fluids, practise good hygiene and keep an eye on people who may be more vulnerable.
As symptoms improve, continue taking sensible precautions around others, particularly older adults, babies, pregnant people and those with weakened immune systems. Health New Zealand recommends additional precautions for five days after returning to normal activities, including wearing a mask in crowded indoor settings and maintaining good hygiene.
Influenza may be a familiar winter illness, but it should not be underestimated. Taking simple steps early can help protect individuals, families and the wider Christchurch community.
Disclaimer
This article is intended for general information and awareness only and is not medical advice. Influenza symptoms can overlap with other illnesses, and treatment decisions should be made with a qualified healthcare professional. If symptoms are severe, worsening or concerning, seek medical advice promptly.
For more New Zealand news, local updates and community stories, visit NZ Indian Insights for the latest updates from Aotearoa.
