What type of virus causes measles?

Measles is caused by a highly contagious virus known as the measles virus, which is classified as a paramyxovirus. This virus spreads easily through respiratory droplets when an infected person coughs or sneezes. The term "highly contagious" indicates that it can be transmitted effortlessly from person to person, making it a significant public health concern. It is critical to understand that measles can infect those who are not vaccinated or have not had the disease before.

Contrary to the other options, measles is not caused by bacteria, fungi, or parasites. Bacterial infections, for example, involve entirely different mechanisms and treatments than viral infections. While fungal and parasitic infections also have their unique characteristics and causes, they are not involved in measles. Understanding the nature of the measles virus helps highlight the importance of vaccination and public health measures to prevent outbreaks.