Humans have an exceptional ability to deal with viruses. In most cases, your immune system is able to fight an infection. On the other hand, your body provides a spa-like environment that is temperate and stable, optimal for viruses to replicate. Human behavior, including close contact with animals and frequent travel, also increases the likelihood of becoming infected.
From the perspective of viruses spread by insects, or arboviruses, making the evolutionary leap from insects to humans is a tough battle. Viruses cannot replicate very well in humans, which means transmission from mosquitoes is often very difficult.
