Hep A is usually spread when a person ingests even tiny amounts of contaminated fecal matter, having contaminated food or water, or being near a person who has it.
Immune cells involved in immune response
The immune cells involved in the immune response is the adaptive immune cells because once you get it once, you can't get it again.
How the virus repicates
When the virus enters the host cell, it loses its capsid and the RNA induces the host cell to produce viral poly-protein without shutting of protein synthesis. With the viral proteins, a protease for the making of structural proteins and a polymerase for the replication of viral RNA which become encapsulated into new viruses. It is the lyctic cycle.
Hep A is treatable by a medical professional, and it is preventable by a vaccine. The diagnosis requires lab tests or imaging to be sure.
Hep A is preventable by drinking only clean food and water, and not being near people who have it, and getting the vaccine.