Answer: Persistent Viral infection
Explanation:
Persistent viral infections lasts for long periods of time and it takes place when primary infection is not cleared by the adaptive immune response.
A chronic infection is a type of persistent infection in which is eventually cleared but its infection in actual lasts for a longer duration of time.
Example: HIV-1, measles are some example of persistent viral infections.
So, the viral infection that lasts for a longer duration of time is known as persistent viral infection.
