WHO campaigns

World Health Day: Key messages


Vectors spread diseases

Mosquitoes, flies, ticks, bugs and freshwater snails can spread diseases that cause serious illness and death.

Diseases are preventable

Diseases such as malaria, dengue, leishmaniasis and yellow fever are preventable, yet they have the biggest impact on some of the world’s poorest people.

50% of population is at risk

More than half of the world’s population is at risk of these diseases. Increased travel, trade and migration make even more people vulnerable.

Protect yourself

You can protect yourself and your family by taking simple measures that include sleeping under a bednet, wearing a long-sleeved shirt and trousers and using insect repellent.


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