What occurs when people come in direct contact with a harmful agent near an incident?

When people come in direct contact with a harmful agent near an incident, they may experience immediate health effects depending on the type of agent involved, such as chemical exposure, biological toxins, or radiation. Symptoms can range from mild irritation to severe illness or injury. Additionally, there may be a risk of secondary contamination, where the harmful agent spreads to others or the environment. Prompt medical attention and decontamination are crucial to mitigate the effects of exposure.