What are the symptoms of being exposed to ozone?

As a concerned individual in the field of environmental health, I'm curious to understand the symptoms that individuals may exhibit when exposed to ozone. Could you elaborate on the potential effects of ozone exposure, especially in terms of respiratory discomfort? Are there any early warning signs that should prompt individuals to seek medical attention? Additionally, are there any specific groups or individuals who are more susceptible to the adverse effects of ozone? Your insights would be greatly appreciated in order to raise awareness and mitigate potential health risks.