**7. Conclusion**

The situation of planet earth is becoming more and more critical every day, especially in countries that care little about the problems caused by global warming and the various forms of pollution of ecosystems. The future of mankind looks very threatened and bleak due to the multifaceted impact of climate change on biodiversity, agriculture, environment and human and animal health. Indeed, the consequences of climate change on public health are today almost indisputable; they are particularly noticeable in vector-borne diseases. Slight variations in the average temperature, in the rainfall regime, in humidity, can have serious health

implications, mainly in tropical developing countries because they are likely to affect the physiology of vectors.

The Republic of Haiti has suffered for years the adverse effects of climate change with a marked disturbance in the rainfall regime, the occurrence of prolonged periods of drought and an increase in air temperature. Descriptive epidemiological studies reveal significant prevalence rates of many vector-borne diseases in the country: malaria, dengue fever, chikungunya, Zika, yellow fever, Nile Valley fever, lymphatic filariasis, diseases linked to tick bites, etc. While the causal relationship between health and climate and environmental changes has not yet been clearly defined in Haiti for lack of in-depth epidemiological studies, there is no doubt that there is a positive correlation between these variables.

It is therefore high time to conduct studies on climate change at national and regional levels in order to better understand their impact on terrestrial and aquatic ecosystems and to better understand, in particular, their impact on human and animal health through analytical epidemiological research. It is therefore urgent to take the necessary steps to define a coherent framework of action and intervention strategies likely to facilitate the reversal of the accelerated trend of degradation of the environment and the health of the population, at least in areas of the country identified as high risk. This framework will include in its approach the "One health" approach, taking into account the environmental component in the field of action of human and animal health with a view to reducing the effects of climate change on human health in Haiti.

The variations observed in the epidemiology of vector-borne diseases, in particular arboviruses (dengue fever, yellow fever, Zika for example), result from social, economic and environmental changes that are largely dependent on climate change. It is important to understand the dynamics of this evolution in the country which is faced with a great lack of local meteorological and climatic data, due to the lack of stations or centers assigned to the collection of this data on a regular and systematic basis. In addition, there is also no reliable information on the biotopes of arthropod vectors, any changes that have occurred in their way of life in recent decades, the distribution of vectors at the country level, the contributing factors and/or limiting their proliferation in the Haitian context, estimates of their population according to periods of rain and drought, etc.

The country benefits from considering the opportunity to revitalize the intersectoral cooperation platform with a strong involvement of national and foreign universities to make it functional and capable of properly addressing the various problems related to climate change and its impact on public health by general and vector-borne diseases in particular It is in this perspective that the next actions of Quisqueya University will be oriented.
