How to prevent colds and flu this winter: a guide to respiratory health

As temperatures drop and the kids start bringing home the first bugs, colds and flu begin creeping into every household. Respiratory infections spike during winter for well-documented reasons, and families with school-age children often find themselves passing illness around for months. The good news is that a few practical, everyday habits can reduce your risk significantly, and catching symptoms early makes a real difference to how quickly you recover.

This guide covers why we get sick more often in winter, how to prevent the flu naturally, how to avoid catching it when someone at home is already ill, and what to do at the first sign of a scratchy throat, including how Trifectiv Plus Air nebulising solution can fit into your family's evening routine as a gentle, non-drowsy line of defence.

Why do we get colds and flu in winter?

You have probably heard that cold weather makes you sick. That is not quite right. Viruses cause colds and flu, not the cold itself. But winter does create the perfect conditions for those viruses to spread and for your body's defences to weaken. Here is what happens:

Your nose loses its edge. Research published by rhinologists at Stanford and Harvard found that when cold air enters your nose, the temperature inside can drop by as much as 5°C. This reduces the number of virus-fighting particles your nasal cells produce by nearly half, cutting your first line of immune defence significantly.
Viruses survive longer. The flu virus has an outer fatty layer that hardens in cold, dry air, helping it survive on surfaces and in the air for much longer than it does in warmer months.
We crowd indoors. Less ventilation, closer contact, and more shared surfaces mean viruses pass easily from person to person. Schools, offices, and public transport become hotspots.
Lower vitamin D. Reduced sunlight in winter means your body produces less vitamin D, a nutrient that plays an important role in regulating your immune system.
Dry air dries your airways. The tiny hairs (cilia) in your upper respiratory tract that normally sweep viruses out of your nose and throat work less effectively in dry air, giving viruses more time to take hold.

In short, it is not the cold that makes you ill. It is the combination of weakened natural defences and increased exposure to viruses that tips the balance.

How to prevent the flu naturally

Prevention starts well before anyone in the house starts sneezing. The basics are simple but easy to neglect when life gets busy:

Wash your hands properly. Soap and water for at least 20 seconds, especially before meals and after being in public spaces. This remains the single most effective everyday habit for preventing respiratory infections, according to the CDC.
Sleep enough. Aim for 7 to 8 hours per night for adults. Your immune system repairs and strengthens itself during sleep. Skimping on rest leaves you more vulnerable.
Eat well. Focus on whole plant foods, lean proteins, and healthy fats. Dark leafy greens, citrus fruits, and bell peppers are rich in vitamin C. Eggs, salmon, and fortified dairy provide vitamin D. Fermented foods like yoghurt and sauerkraut support your gut biome, which plays a significant role in immune function.
Stay hydrated. Drink 7 to 8 glasses of water a day. Hydrated mucous membranes in your nose and throat are better at trapping and flushing out viruses.
Move your body. Moderate exercise boosts your immune system by increasing circulation and the activity of natural killer cells, the white blood cells that destroy infected cells. You do not need to overdo it. A brisk 20 to 30 minute walk most days is enough.
Supplement wisely. Vitamin C, vitamin D, zinc, and elderberry all have some evidence behind them for immune support. Zinc in particular may help shorten the duration of cold symptoms. Speak to your pharmacist about what makes sense for you.
Manage stress. Chronic stress suppresses immune function. Find what works for you, whether that is a walk, a few minutes of deep breathing, or simply switching off your phone for an hour before bed.
Use daily nebulising as a preventative. Nebulising once every second day with 5 ml of Trifectiv Plus Air through a mesh nebuliser helps maintain a clean, resilient environment in your airways and killing any bugs before they take hold. The active ingredient, hypochlorous acid (HOCl), is a naturally occurring molecule produced by your own white blood cells to fight infection and reduce inflammation. Using it as indicated is a gentle, non-drowsy way to support your respiratory defences before illness takes hold.

How to avoid getting the flu when your family has it

When a family member goes down with flu, it can feel inevitable that everyone else will follow. But you can reduce the spread with a few targeted measures:

Isolate where possible. If the sick person can stay in one room (and one bathroom), that limits the virus to a smaller area. This is not always realistic with young children, but do what you can.
Clean high-touch surfaces daily. Door handles, light switches, remote controls, taps, and phones. Flu viruses can survive on hard surfaces for up to 48 hours.
Do not share towels, cups, or cutlery. Use separate hand towels in the bathroom and kitchen.
Ventilate the house. Open windows when you can, even briefly. Fresh air dilutes the concentration of airborne virus particles.
Wash your hands after every contact. After helping a sick child blow their nose, after touching used tissues, after handling their bedding.
Increase your nebulising frequency. If someone in the house is sick, consider nebulising with Trifectiv Plus Air three times a day instead of once. This delivers hypochlorous acid directly to your airways, where it acts as both a disinfectant and an anti-inflammatory. It targets viruses, bacteria, and fungi without causing drowsiness or interfering with your daily routine.

Remember that people with flu are contagious from about a day before symptoms appear, so the virus may already have spread before anyone realises they are ill. This is exactly why preventative habits matter.

How to prevent a cold when you feel it coming on

That familiar scratchy throat, the slight heaviness behind your eyes, the first sneeze of the day. You know something is brewing. Acting fast in this window can make the difference between a mild sniffle and a week on the sofa.

Rest immediately. Your body is already fighting. Give it the resources it needs. Cancel what you can and get an early night.
Drink plenty of fluids. Water, warm broth, and herbal teas keep your mucous membranes moist and help your body flush out the virus. Honey in warm water can soothe a sore throat (not suitable for children under one year).
Take zinc. Some research suggests that zinc lozenges taken within the first 24 hours of symptoms may help reduce the duration of a cold.
Gargle with salt water. A simple saline gargle can reduce throat irritation and help clear viral particles from the back of the throat.
Start nebulising three times a day. At the first sign of respiratory irritation, increase your Trifectiv Plus Air nebulising to three times daily. The hypochlorous acid works directly where the infection is starting, in your throat, nasal passages, and airways, reducing the microbial load and calming inflammation before it takes hold. It is non-toxic, has no drowsy side effects, and fits easily into a morning, after-school, and bedtime routine.

How to use Trifectiv Plus Air: a quick guide

Nebulising sounds more complicated than it is. Here is what you need to know:

Equipment: Use a modern nebuliser that produces aerosol particles smaller than 5 microns. This is important because larger particles only reach the nose and throat. Smaller particles travel deep into the lungs where they are most effective.
Dose: Adults use 5 ml per session. For children, calculate 0.5 ml per year of age, up to a maximum of 5 ml. So a 6-year-old would use 3 ml.
Frequency: Once every second day for prevention. Three times per day if you have an active infection, dry cough, or wheezing.
Use undiluted. Never mix with water or other solutions.
Breathe deeply through the mouthpiece or facemask. If using a facemask, alternate between breathing through your mouth and nose for full coverage.
Do not return unused solution to the bottle. Discard any liquid left in the reservoir after each session, and leave the reservoir open to air dry between uses. The solution is light-sensitive, so keep the bottle sealed and stored away from direct light.
Safe for everyone. Trifectiv Plus Air is non-toxic, tasteless, and odourless. It is safe for babies, children, pregnant women, and breastfeeding mothers. The active ingredient, hypochlorous acid, carries FDA G.R.A.S. (Generally Recognised as Safe) status.

Important note: Trifectiv Plus Air should not be used together with inhaled cortisone or steroid lung therapies, as the two tend to cancel each other out and you will not get the benefit of either one.

Fitting nebulising into a busy evening routine

One of the most common barriers to any health habit is time. The good thing about nebulising is that it takes only a few minutes and requires no active effort. You can easily build it into your existing evening wind-down:

Nebulise while reading a bedtime story to the kids.
Let older children nebulise while doing homework or watching something.
For adults, nebulise while catching up on a podcast or scrolling through your phone before bed.
Because it is non-drowsy and has no taste or smell, there is no resistance from children or fussy family members.

The key is consistency. A daily 5-minute nebulising session throughout winter is a small investment that may save your family days of illness.

When to see a doctor

Most colds and mild flu can be managed at home. But you should seek medical attention if you or your child experience any of the following:

A fever above 39°C that does not respond to paracetamol or ibuprofen.
Difficulty breathing, shortness of breath, or chest pain.
Symptoms that improve and then suddenly worsen again (this can signal a secondary bacterial infection).
Severe or persistent vomiting or dehydration.
Symptoms lasting more than 10 days without improvement.

For people with asthma, COPD, diabetes, or weakened immune systems, err on the side of caution and seek medical advice earlier rather than later.

The bottom line

Winter illness is not inevitable. Good hygiene, proper nutrition, adequate sleep, and a proactive approach to respiratory care can keep your family healthier through the cold months. When prevention is not enough and symptoms do appear, acting quickly, resting, and supporting your airways with Trifectiv Plus Air nebulising solution can help shorten recovery time and reduce discomfort.

Hypochlorous acid is not a new or untested ingredient. It is produced naturally by your own immune system and has been used in clinical wound and respiratory care for years. The difference now is that it is available in a stable, medical-grade formula that you can use at home, safely and effectively, for your whole family.

References

CDC. Healthy habits to prevent flu.
Johns Hopkins Medicine. Winter illness guide.
Scientific American. Why people get more colds in winter.
CNN Health. Scientists uncover biological reason for winter colds.
Mayo Clinic. Why do people get sick with viruses in winter?
NCCIH. Natural products for the flu and colds: what does the science say?
Trifectiv Plus Air - product information and usage instructions. trifectiv.com