At Shivas Pharmacy, our West Croydon travel clinic regularly advises patients on how to stay safe from mosquito-borne diseases. While many travellers prepare by booking their travel vaccinations in Surrey, a surprising number overlook the importance of using an effective insect repellent. Among the many products available, DEET insect repellent remains the gold standard for protection. However, it is also one of the most misunderstood. From worries about melting plastic to confusion over “natural” alternatives, there are plenty of myths that need clearing up.

As travel health professionals, we believe understanding how repellents work is just as important as getting your vaccines. Here are the most common myths about insect repellent, explained by our pharmacy team.

Myth 1: If You Use DEET Insect Repellent, You Don’t Need Vaccines

Many travellers believe that using DEET insect repellent alone provides full protection against mosquito-borne diseases, but this is not true. While DEET is highly effective at preventing mosquito bites, it does not make you immune to infections such as yellow fever, Japanese encephalitis, or malaria. These diseases are transmitted when mosquitoes bite, and while DEET reduces that risk significantly, it cannot replace the protection that vaccines provide.

Vaccinations work by training your immune system to recognise and fight specific diseases if you are exposed to them. Repellents like DEET simply reduce your chances of being bitten. The best travel protection comes from combining both.

At our West Croydon travel clinic, we always recommend using DEET alongside the necessary travel vaccinations in Surrey for your destination. This combined approach ensures the highest level of defence, keeping you safe wherever your journey takes you.

Myth 2: Natural Repellents Work Just As Well

Many travellers assume that natural repellents such as citronella, lemon eucalyptus, or lavender oils offer the same level of protection as DEET. Unfortunately, they do not. While some natural oils can repel mosquitoes for a short time, they wear off quickly and are far less effective in high-risk regions.

Research consistently shows that DEET remains the most reliable active ingredient for preventing mosquito bites. In areas where diseases like malaria, dengue, Zika, or Japanese encephalitis are present, relying on natural repellents alone can leave you exposed. At our West Croydon travel clinic, we always recommend DEET-based products, especially for travellers visiting tropical or subtropical regions.

Natural repellents can be used as an additional layer, but they should never replace DEET when travelling to destinations where mosquito-borne diseases are common.

Myth 3: The Stronger The DEET, The Better The Protection

It is easy to assume that a higher percentage of DEET means stronger protection. In reality, the concentration affects how long the protection lasts, not how effective it is. For example, a product containing 30% DEET may protect you for up to six hours, while one with 50% might last closer to ten hours.

Choosing the right strength depends on where you are going and how long you will be outdoors. For most destinations, 30–50% DEET is more than enough. If you are unsure, our pharmacists can help you select the appropriate concentration during your travel consultation.

Myth 4: You Don’t Need Repellent If You’re Taking Malaria Tablets

Some travellers believe that malaria tablets alone are enough to prevent bites. This is not the case. While malaria prophylaxis reduces your risk of contracting the disease, it does not stop mosquitoes from biting you in the first place. DEET insect repellent adds a crucial layer of protection by preventing bites altogether.

It is also important to remember that malaria is not the only mosquito-borne illness. Dengue fever, Zika virus, chikungunya, and yellow fever can all be transmitted by mosquitoes. Using DEET alongside your prescribed malaria tablets provides a more complete defence.

Myth 5: You Only Need Repellent At Night

Many travellers pack their repellent for evening use, assuming mosquitoes only come out after dark. This is a dangerous misconception. Certain species, such as the Aedes mosquito, which spreads dengue and Zika, are active during the day.

Wearing repellent throughout the day and evening is the safest approach. Apply DEET to any exposed skin and reapply after swimming or heavy sweating. Pairing it with loose-fitting clothing that covers your arms and legs offers additional protection.

The Role Of Vaccinations In Travel Health

While insect repellents like DEET are vital for preventing bites, they work best when combined with appropriate travel vaccinations. Many mosquito-borne illnesses can be prevented through vaccination, including yellow fever, Japanese encephalitis, and, in some regions, malaria prophylaxis.

At Shivas Pharmacy, we provide comprehensive travel vaccinations in Surrey for travellers heading to all parts of the world. Our healthcare professionals will discuss your destination, duration of stay, and planned activities to tailor a vaccination and protection plan specifically for you. This includes guidance on insect repellents, clothing, and travel medicines. Reach out today for personalised travel advice.

Complete Travel Protection in Croydon

DEET insect repellent remains the most effective and scientifically supported way to prevent mosquito bites. The myths surrounding it often lead travellers to make poor choices that increase their risk of infection abroad. Used properly, DEET is safe, reliable, and essential for protecting yourself from diseases that can ruin your trip or affect your long-term health.

Our West Croydon travel clinic is here to help you prepare for safe and healthy travels. From expert advice on repellents to essential vaccinations, Shivas Pharmacy provides everything you need for complete travel protection. Before your next adventure, book a consultation with our team and ensure you are protected from every angle.

This blog was written on behalf of Shivas Pharmacy by Pharmacy Mentor.