Abstract
Environmental degradation, population movements and urban agglomerations have broken down the borders for infectious diseases. The expansion of microorganisms has entered an increasing area of transmission vectors. The lack of immunity of the population leads to an increased risk of spreading infectious diseases. Furthermore, the decline in vaccination rates in developed countries and socio-economic difficulties in large regions has meant that diseases in the process of eradication have re-emerged. That is why health care workers must be trained to avoid delaying in diagnosis and to accelerate the implementation of public health measures. A great deal of education and health prevention should fall under the responsibilities of travellers who move around different regions.
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