Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The prodromal period is the early stage of an infectious disease where symptoms are not yet fully developed but mild signs, such as fatigue or discomfort, are present. It occurs after the incubation period and before the illness becomes acute.
5 Must Know Facts For Your Next Test
The prodromal period often includes nonspecific symptoms like headache, malaise, and low-grade fever.
It marks the point where the pathogen has multiplied enough to cause noticeable effects on the host.
Duration of the prodromal period can vary depending on the infectious agent and individual host factors.
Early detection during this period can help in preventing further spread of the disease through quarantine or treatment.
Not all infectious diseases have a clearly identifiable prodromal period.