What is the difference between vector and parasite?

A vector is an organism, often an insect, that transmits pathogens or parasites from one host to another without being affected by them, such as mosquitoes transmitting malaria. In contrast, a parasite is an organism that lives on or in a host, deriving nutrients at the host's expense, which can lead to harm or disease. While vectors facilitate the spread of diseases, parasites are the organisms that cause the infections.