What should you know about genetically modified mosquitoes and malaria?

Some mosquito-control approaches alter a mosquito's ability to reproduce or carry the malaria parasite. The aim is to reduce the number of infectious bites in a community. These methods are population-level public-health measures, and their use depends on local regulation, monitoring and environmental assessment.

Malaria is transmitted by infected mosquitoes, not by the genetic modification itself. A person who has travelled to or lived in an area where malaria occurs can still develop symptoms such as fever, chills or muscle aches. Read more about [Malaria](/conditions/malaria/) and its [Fever](/symptoms/fever/) symptoms.

For travel, use insect repellent as directed, wear clothing that limits exposed skin, and follow advice about sleeping under an insecticide-treated net or in screened accommodation. Ask about [Malaria Prophylaxis](/treatments/occupational-and-travel-medicine/malaria-prophylaxis/) before departure; the choice depends on destination, itinerary and medical history.

If you develop fever, chills or muscle aches during travel or after returning, tell a clinician where you have been. A [Blood Test](/treatments/diagnostics-and-screening/blood-test/) may be needed, and malaria treatment should be guided by a clinician.

Seek urgent medical care for fever or a flu-like illness after possible malaria exposure, especially if you become confused, very weak, short of breath, unable to drink, or repeatedly vomit. Malaria can worsen quickly, so do not wait for symptoms to become severe.

Ask which destinations carry malaria risk, whether you need a [Travel Health Consultation](/treatments/occupational-and-travel-medicine/travel-health-consultation/), what prevention suits your medicines and health conditions, and how long to watch for symptoms after returning.