Vector-borne diseases cause more than 700,000 deaths each year.
But what are vectors? Vectors are living organisms that can transmit infections between humans, or from animals to humans. The most important vectors in this equation are insects that feed on blood, ingesting disease-producing microorganisms from a host that is already infected, whether human or animal, thus starting a chain of transmission to a new host. This means that a vector that is infectious, can transmit the pathogen until the end of its life for each bite it makes to feed itself.
Vector-borne diseases are human diseases caused by parasites, viruses and bacterias, transmitted by vectors. Every year more than 700,000 deaths occur from diseases such as Malaria, Dengue, Zika, West Nile virus, Schistosomiasis, African Human Trypanosomiasis, Leishmaniasis, Chagas disease, Yellow Fever, Japanese Encephalitis and Onchocerciasis.
These diseases are more common in tropical and subtropical areas and end up having a greater impact on the poorest population. However, with the ease of transport that exists today, viruses from Africa, Asia and Ibero-America are able to reach climates less suited to the survival of these insects. This fact, combined with the impact of climate change, which make winters increasingly hot, means that eggs can survive and that in the future we may have an increasing risk of infection in various places on the planet.