Mosquitoes are now able to bite humans and spread diseases all year round due to warmer weather. 

Mosquitoes, which can spread diseases like dengue fever and Zika virus, used to be active mostly during warm months and inactive during cold months. But now, due to warmer weather, mosquitoes are able to bite humans and spread diseases all year round, instead of just during the warmer months. This is because the changing environment, like rising temperatures and different rainfall patterns, is making it easier for mosquitoes to survive and spread in new areas where they weren't common before.

This change in mosquito behavior is a problem, especially in places where mosquitoes didn't used to be active during certain times of the year, like winter months in some parts of the United States. Warmer winters are allowing mosquitoes to survive and be active throughout the year, which increases the risk of diseases spreading.

Human activities like urbanization and deforestation are also making it easier for mosquitoes to find places to breed and thrive. Mosquitoes are adapting to these changes and taking advantage of new habitats created by humans, which is making them more active and widespread.

This change in mosquito behavior is a big concern for public health because mosquito-borne diseases are dangerous for humans. It's important to have effective ways to control mosquitoes, like using insecticides, monitoring mosquito populations, and educating people about how to prevent mosquito bites.