Asymptomatic infections are primarily governed by specific host immune responses and viral loads, wherein balanced or tolerant immune mechanisms prevent symptom progression.
The retrieved papers consistently indicate that whether a viral infection remains asymptomatic or becomes symptomatic is determined by the interplay between the host immune response and viral load. Papers [0], [4], and [6] explicitly connect asymptomatic outcomes to robust, regulated immune profiles and controlled viral levels, supporting the claim without any contradictory evidence.