Epidemiologists predict that rates may dramatically increase when vector organisms and animals enter new ecosystems due to global climate change

infectious disease.

Explanation:

As the climate changes so does the land and the ocean temperatures and with this rising temperature change the chances of the spread of various infectious diseases also rose as the vector born diseases travel through the air and the infected person to the far off distant land and spread and multiples quick. The spread of the superbug that can survive in the extreme climatic conditions even the antarctic climatic has been found in many places, this raises a concern for the epidemiologists that new organism and animals that enter these ecosystems will be impacted by there spread by the changes in the climate of the earth.

Then it is june the conclusion to the second sentence is just restating "if it is june then it is summer"