The first time we are exposed to a pathogen,we often become ill because _________.

Question

Quizplus · Accepted Answer

The first time we are exposed to a pathogen, our immune system has to mount a primary immune response, which can take 7 to 10 days to fully develop. During this time, we may experience symptoms of illness as the pathogen replicates and spreads in our body. However, once the primary immune response is complete, our immune system will have created memory cells that can quickly recognize and respond to the same pathogen in the future, leading to a faster and stronger secondary immune response.

The First Time We Are Exposed to a Pathogen,we Often